USCG Navigation General Questions: Master's License

1: Unlighted, red and green, horizontally-banded buoys with the topmost band red ____________.

2: On an isomagnetic chart, the line of zero variation is the __________. 3: Blinking of a Loran-C signal indicates ____________. 4: Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are _____________. 5: A vessel is steaming in east longitude on January 25 and crosses the International Date Line on an eastbound course at 0900 zone time. What is the date and time at Greenwich when the vessel crosses the line? 6: Wind velocity varies ______________. 7: The period at high or low tide during which there is no change in the height of the water is called the __________. 8: When you are steering on a pair of range lights and find the upper light is above the lower light you should __________. 9: When displayed under a single-span fixed bridge, red lights indicate _____________________. 10: The wind at Frying Pan shoals has been northwesterly at an average velocity of 22 knots. The predicted set and drift of the rotary current are 125ø at 0.6 knot. What current should you expect? 11: A buoy having red and green horizontal bands would have a light characteristic of _____________. 12: Lines on a chart which connect points of equal magnetic variation are called _____________. 13: Most modern Loran-C receivers, when not tracking properly, have a(n) _____________. 14: You have replaced the chart paper in the course recorder. What is NOT required to ensure that a correct trace is recorded? 15: What is the length of a nautical mile? 16: The direction of the surface wind is _____________________. 17: "Stand" of the tide is that time when _____________________. 18: A vessel's position should be plotted using bearings of ________________. 19: You are approaching a swing bridge at night. You will know that the bridge is open for river traffic when __________. 20: You are underway on course 050² T and your maximum speed is 12 knots. The eye of a hurricane bears 120² T, 110 miles from your position. The hurricane is moving towards 285² T at 25 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA? 21: Which buoy is NOT numbered? 22: Charts showing the coast of Mexico are produced by the United States _____________. 23: If Loran-C signals become unsynchronized, the receiver operator is warned because ______________. 24: When the gyropilot is used for steering, what control is adjusted to compensate for varying sea conditions? 25: You are in LONG 144² E. The date is 6 February, and the zone time is 0800. The Greenwich date and time are ________________. 26: Wind direction may be determined by observing all of the following EXCEPT ______________. 27: Spring tides are tides that _________________. 28: When using a buoy as an aid to navigation which of the following should be considered? 29: You are approaching a multiple-span bridge at night. The main navigational channel span will be indicated by _______. 30: When taking an amplitude, the Sun's center should be observed on the visible horizon when ___________. 31: When approaching a preferred-channel buoy, the best channel is NOT indicated by the _____________. 32: The datum used for soundings on charts of the Atlantic Coast of the United States is mean _____. 33: Most modern Loran-C receivers automatically detect station blink which _________________. 34: The Local Notice to Mariners is usually published _________. 35: You are on a vessel at 0400 ZT on 3 July, and the ZD for your position is -8. What is the GMT? 36: A strong, often violent, northerly wind occurring on the Pacific coast of Mexico, particularly during the colder months, is a ______________. 37: What does the term "tide" refer to? 38: When navigating a vessel, you _______________. 39: Civil twilight begins at 1910 zone time on 20 July 1981. Your DR position at that time is LAT 22ø16' N, LONG 150ø06' W. Which statement concerning the planets available for evening sights is TRUE? 40: The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1600 and turn for 8 knots, at what point will you lose the ebb current? 41: Mean high water is the reference plane used for _____. 42: The datum used for soundings on charts of the the East Coast of the United States is _____. 43: A buoy with a composite group-flashing light indicates a(n) ________. 44: The speed of sound through ocean water is nearly always _________. 45: The navigator aboard a ship at approximately 165² E longitude observes the Sun at ZT 14-25-04 on 21 September. What is the GMT and Greenwich date of the observation? 46: What wind reverses directions seasonally? 47: The range of tide is the __________________. 48: When should a navigator rely on the position of floating aids to navigation? 49: While steering a course of 150ø T, you wish to observe a body for a latitude check. What would the azimuth have to be? 50: The difference between the heights of low and high tide is the __________. 51: In the U.S. Aids to Navigation System, red and green horizontally-banded buoys mark _____________. 52: The reference datum used in determining the heights of land features on most charts is _____. 53: Loran-C may be used for safe navigation in harbor areas due to _____. 54: The elapsed time of a fathometer signal (from sound generation to the return of the echo) is 1 second. What is the depth of the water at the point sounded? 55: Your longitude is 179ø59' W. The LMT at this longitude is 23h 56m on the 4th day of the month. Six minutes later, your position is 179ø59' E longitude. Your LMT and date are _____________. 56: A strong, often violent, northerly wind occurring on the Pacific coast of Mexico, particularly during the colder months, is called ________. 57: The height of tide is the ___________________. 58: You should plot your dead reckoning position _____. 59: For navigational purposes, each great circle on the Earth has a length of ______________. 60: The predicted time that the ebb begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1630 and turn for 12 knots, at what point will you lose the flood current? 61: Red lights may appear on _____________. 62: Charted depth is the _____. 63: A "full service" Loran-C receiver will provide ___________. 64: Mean lower low water is the reference plane used for _____. 65: The LMT of LAN is 1210. Your longitude is 70²30' E. Which time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN? 66: What will a veering wind do? 67: What is the definition of height of tide? 68: A position obtained by taking lines of position from one object at different times and advancing them to a common time is a(n) ____________. 69: The parallax angle will vary the most with the time of year for ______________. 70: The station located at "A" is the __________________. 71: A preferred-channel buoy may be ___________. 72: The datum from which the predicted heights of tides are reckoned in the tide tables is _____. 73: After initial turn-on, most modern Loran-C receivers will be automatically tracking within _____________. 74: When operated over a muddy bottom, a fathometer may indicate ________. 75: The zone time of LAN is 1152. Your longitude is 73²15' E. What time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN? 76: In the Northern Hemisphere, a wind that shifts counterclockwise is a ______________. 77: When there are small differences between the heights of two successive high tides or two low tides, in a tidal day, the tides are called ______________. 78: A single line of position combined with a dead-reckoning position results in a(n) _________________. 79: The rate of increase in hour angle is the slowest for _______________. 80: When the moon is at first quarter or third quarter phase, what type of tides will occur? 81: A buoy with a composite group-flashing light indicates a(n) _________. 82: On the west coast of North America, charted depths are taken from ____. 83: All Loran-C transmitting stations are equipped with cesium frequency standards which permit _____________. 84: When using an echo sounder in deep water, it is NOT unusual to __________. 85: Your longitude is 179ø59' W. The LMT at this longitude is 23h 56m of the 4th day of the month. Six minutes later your position is 179ø59' E longitude. Your LMT and date is now ___________. 86: A weather forecast states that the wind will commence backing. In the Northern Hemisphere, this would indicate that it will ________________. 87: A tide is called diurnal when _____________. 88: Which position includes the effects of wind and current? 89: The GHA of the first point of Aries is 315² and the GHA of a planet is 150². What is the right ascension of the planet? 90: When the moon is new or full, which type of tides occur? 91: A preferred-channel buoy will show a ___________. 92: When utilizing a Pacific Coast chart, the reference plane of soundings is _____. 93: The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with _________. 94: When using a recording depth finder in the open ocean, what phenomena is most likely to produce a continuous trace that may not be from the actual ocean bottom? 95: The difference in local time between an observer on 114ø W and one on 119ø W is _____________. 96: A weather forecast states that the wind will commence veering. In the Northern Hemisphere this indicates that the wind will _____________. 97: The lunar or tidal day is ___________. 98: A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) ________. 99: You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter _______. 100: You are underway on course 050² T and your maximum speed is 12 knots. The eye of a hurricane bears 080² T, 100 miles from your position. The hurricane is moving towards 265² T at 22 knots. What course should you steer at 12 knots to have the maximum CPA? 101: A lighted preferred-channel buoy may show a _____. 102: Which statement about a DMAHTC chart with stock no. 23BHA23433 is TRUE? 103: In Loran-C the high accuracy of atomic time and frequency controls allows each station to operate _____________. 104: What should you apply to a fathometer reading to determine the depth of water? 105: If the GMT is 1500, the time at 75ø E longitude is ________. 106: A local wind which occurs during the daytime and is caused by the different rates of warming of land and water is a ________. 107: The average height of the surface of the sea for all stages of the tide over a 19 year period is called ___________. 108: A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) ___________. 109: While proceeding along the Norwegian coast on course 039ø T, you sight the black-yellow-black banded buoy shown bearing 053ø T. What action should you take? 110: A millibar is a unit of _____________. 111: Green lights may appear on _______________. 112: Which chart number indicates a DMAHTC chart designed for inshore coastwise navigation? 113: The type of transmission used in Loran-C is a _____________. 114: All echo-sounders can measure the ________. 115: The date is the same all over the world at ________________. 116: Which wind results from a land mass cooling more quickly at night than an adjacent water area? 117: Mean high water is the average height of __________. 118: What describes an accurate position that is NOT based on any prior position? 119: While proceeding along the Mediterranean coast of Spain, you sight the black and yellow buoy shown. Your course is 039ø T, and the buoy bears 053ø T. What action should you take? 120: You are underway on course 050² T and your maximum speed is 13 knots. The eye of a hurricane bears 100² T, 120 miles from your position. The hurricane is moving towards 275² T at 25 knots. If you maneuver at 13 knots to avoid the hurricane, what could be the maximum CPA? 121: A safe water mark may be _____________. 122: The subregions of the United States Gulf and East Coasts are numbered 11, 12, and 13 within the chart numbering system. Which chart number indicates a chart for either the Gulf or East Coast? 123: If the radio signal ground wave extends out for less distance than the minimum skywave distance, there is an area in which no signal is received. This is called the ______. 124: An electronic depth finder operates on the principle that ________. 125: The GMT is 0445 and your zone description is +1. Your zone time is _____________. 126: A katabatic wind blows ______________. 127: Mean low water is the average height of ___________. 128: A position obtained by applying only your vessel's course and speed to a known position is a ________. 129: In working out a local apparent noon sight for your latitude, you subtract the Ho from 90ø. The 90ø represents the angular distance from _____. 130: The distance between the surface of the water and the tidal datum is the ____________. 131: A vertically-striped buoy may be ______________. 132: The value of sixty nautical miles per degree of geodetic latitude is most correct at __________. 133: The line connecting the Loran-C master station with a secondary station is called the _____________. 134: The recording fathometer produces a graphic record of the ________. 135: The standard meridian for the time zone +1 is _____________. 136: Which Beaufort force indicates a wind speed of 65 knots? 137: Priming of the tides occurs ____________. 138: The path that a vessel is expected to follow, represented on a chart by a line drawn from the point of departure to the point of arrival, is the _____________. 139: What is the geographic longitude of a body whose GHA is 140: You are underway on course 050ø T and your maximum speed is 12 knots. The eye of a hurricane bears 080ø T, 100 miles from your position. The hurricane is moving towards 265ø T at 22 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA? 141: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133ø T, and bears 042ø T, 105 miles from you. What is the time to intercept if you make 10 knots? 142: Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals? 143: Under the IALA - A Buoyage System, a buoy used as a port hand mark would not show which light characteristic? 144: In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n) ________________. 145: The standard time meridian for zone description -1 is _____. 146: What change in the wind could be expected at position D if the low was moving northeasterly? 147: Which statement is TRUE concerning equatorial tides? 148: When possible, a DR plot should always be started from where? 149: You are underway on course 050² T and your maximum speed is 13 knots. The eye of a hurricane bears 100² T, 120 miles from your position. The hurricane is moving towards 275² T at 25 knots. What course should you steer at 13 knots to have the maximum CPA? 150: An alternating light ____________. 151: Under the U.S. Aids to Navigation System, spherical buoys may be ______________. 152: A chart with a natural scale of 1:160,000 is classified as a _____________. 153: The line extending beyond the stations at A and B is referred to as the _____________. 154: Which factor has the greatest effect on the amount of gain required to obtain a fathometer reading? 155: The velocity of the current in large coastal harbors is ___________________. 156: In reading a weather map, closely spaced pressure gradient lines would indicate _____________________. 157: Tropic tides are caused by the __________________. 158: Discounting slip, if your vessel is turning RPM for 10 knots and making good a speed of 10 knots, the current could be _______. 159: The apparent wind can be zero when the true wind is from _____. 160: Loran-C ground waves provide position information of reasonable accuracy out to a maximum of _____________. 161: How is a safe water mark, that can be passed close aboard on either side, painted and lighted? 162: A chart with a scale of 1:80,000 would fall into the category of a _____. 163: How many fixed objects are needed to plot a running fix? 164: The part of a sextant mounted directly over the pivot of the index arm is the _________________. 165: On 6 July 1981, at 1000 zone time, you cross the 180th meridian steaming westward. What is your local time? 166: On the pole side of the high pressure belt in each hemisphere, the pressure diminishes. The winds along these gradients are diverted by the Earth's rotation toward the east and are known as the __________. 167: When the Moon's declination is maximum north, which of the following will occur? 168: Your vessel is making way through the water at a speed of 12 knots. Your vessel traveled 30 nautical miles in 2 hours 20 minutes. What current are you experiencing? 169: You want to transit Hell Gate on 23 July 1983. What is the period of time around the AM (ZD +4) slack before ebb when the current will be less than 0.5 knot? 170: Which of the buoy symbols in illustration D032NG indicates a safe water mark? 171: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks _________________. 172: A chart with a scale of 1:45,000 is a _____. 174: The position labeled D is a(n) ___________________. 175: On 5 July 1981, at 1200 zone time, you cross the 180th meridian steaming westward. What is your local time? 176: Which wind pattern has the most influence over the movement of frontal weather systems over the North American continent? 177: How many high waters usually occur each day on the East Coast of the United States? 178: You are steering a southerly course, and you note that the chart predicts an easterly current. Without considering wind, how may you allow for the set? 179: You are proceeding up a channel at night. It is marked by a range which bears 185ø T. You steady up on a compass course of 180ø with the range in line dead ahead. This indicates that you(r) _________________. 180: What is a lighted safe water mark fitted with to aid in its identification? 181: Which navigational mark may only be lettered? 182: The scale on a chart is given as 1:5,000,000. This means that _____. 183: The maximum reliable ground wave range of Loran-C is approximately _____________. 184: When the index and horizon mirrors of a properly adjusted sextant are at an angle of 45ø to each other, the arc reads ___________. 185: A ship is in longitude 54ø00' W on a true course of 270ø. The ship's clocks are on the proper time zone. At what longitude should the clocks be changed to maintain the proper zone time? 186: In the doldrums you will NOT have ___________. 187: Which statement is TRUE concerning apogean tides? 188: Off Barnegat, NJ, with the wind coming out of the east, the wind-driven current will be flowing approximately ________. 189: While steering a course of 150ø T, you wish to observe the Sun for a speed check. What would the azimuth have to be? 190: You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter ________. 191: Safe water buoys may show ONLY_______________. 192: The description "Racon" beside an illustration on a chart would mean a _____. 193: In using Loran-C, skywave reception gives greater range but is ____________. 194: The horizon glass of a sextant is _______________. 195: The equation of time is 8m 00s. The mean Sun is ahead of the apparent Sun. If you are 2ø W of the central meridian of your time zone, when will the apparent Sun cross your meridian? 196: The area of strong westerly winds occurring between 40² S and 60² S latitude is called the ____________________. 197: Chart legends printed in capital letters show that the associated landmark is _____. 198: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133ø T, and bears 343ø T at 92 miles from you. What is the time to intercept if you make 9 knots? 199: Civil twilight occurs at 0558 zone time on 30 December 1981. Your DR position at that time is LAT 15ø02' N, LONG 46ø02' W. Which statement concerning the planets available for morning sights is TRUE? 201: What is a lighted safe water mark fitted with to aid in its identification? 202: On charts of U.S. waters, a magenta marking is NOT used for marking a _____. 203: In any Loran-C chain, there are three or more stations transmitting pulses which radiate in all directions. One of the stations is the master station, and the others in the chain are the ______________. 204: Because of the reflecting properties of a sextant, if the sextant altitude reads 60ø on the limb, the actual arc of the limb from 0ø to the 60ø reading is ___________. 205: The difference between local apparent time (LAT) and local mean time (LMT) is indicated by the ______________. 206: The winds you would expect to encounter in the North Atlantic between latitudes 5ø and 30ø are known as the __________. 207: An important lunar cycle affecting the tidal cycle is called the nodal period. How long is this cycle? 208: The moon is full and at perigee on 20 January 1983. What is the maximum current you could expect at 2350 (ZD +5) at Nantucket Shoals? 209: The West Wind Drift is located __________. 210: The position labeled C is a(n) ________________. 211: The light rhythm of Morse (A) is shown on ___________. 212: Which aid is NOT marked on a chart with a magenta circle? 214: A sextant having an index error that is "on the arc" has a ________. 215: The equation of time is 12m 00s and the mean Sun is ahead of the apparent Sun. If you are on the central meridian of your time zone, at what zone time will the apparent Sun cross the meridian? 216: The prevailing winds in the band of latitude from approximately 5² N to 30² N are the ________. 217: In some parts of the world there is often a slight fall in tide during the middle of the high water period. The effect is to create a longer period of stand at higher water. This special feature is called a(n) ________. 218: Lines of position may be __________. 219: The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1300 and turn for 13 knots, at what point will you lose the flood current? 220: At 0000 you fix your position and plot a new DR track line. At 0200 you again fix your position and it is 0.5 mile east of your DR. Which statement is TRUE? 221: In United States waters, a buoy having red and white vertical stripes has a light characteristic of ____________. 222: Which statement concerning the illustration is correct? (Soundings and heights are in meters) 223: In the Loran-C configuration shown, the stations located at X, Y, and Z are called _________. 224: A sextant having an index error that is "off the arc" has a ________. 225: The equation of time is 8m 40s. The apparent Sun is ahead of the mean Sun. If you are on the central meridian of your time zone, the apparent Sun will cross your meridian at _____________. 226: What winds blow towards the equator from the area about 30ø north? 227: The class of tide that prevails in the greatest number of important harbors on the Atlantic Coast is ______________. Error reading USCG question 228 weather charts. Which of these symbols indicates a convergence line? 229: The shoreline on charts generally represents the mean _____. 230: If the LORAN-C ground wave does NOT extend out as far as the skywave skip distance, there will be a skip zone in which ______________. 231: You are outbound in a buoyed channel on course 015ø T. You sight a white light showing a Morse (A) characteristic bearing 359ø relative. For safety, you should _______. 232: Which statement concerning the chartlet TRUE? (Soundings and heights are in meters) 233: To determine which Loran-C signal to use, examine the chart and find a set of LOP's which have an angle of at least ___. 234: When the declination of the Moon is 0ø12.5' S, you can expect some tidal currents in Gulf Coast ports to ________. 235: When the equation of time is taken from the Nautical Almanac for use in celestial navigation, it is used to determine ______________. 236: The winds with the greatest effect on the set, drift, and depth of the equatorial currents are the ___________. 237: Neap tides occur when the _____________. 238: The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1430 and turn for 11 knots, at what point will you lose the ebb current? 239: As you enter a channel from seaward in a U.S. port, the numbers on the starboard side buoys _____________. 240: In a river subject to tidal currents, the best time to dock a ship without the assistance of tugs is _________. 241: A spherical buoy may be __________. 242: The difference between the heights of low and high tide is the _____________. 243: The loran lines drawn on navigation charts represent ______. 244: To make sure of getting the full advantage of a favorable current, you should reach an entrance or strait at what time in relation to the predicted time of the favorable current? 245: Yesterday you took a time tick using the 1200 GMT broadcast, and the chronometer read 11h 59m 59s. Today at the 1200 GMT time tick the chronometer read 00h 00m 01s. What is the chronometer error? 246: The consistent winds blowing from the horse latitudes to the doldrums are called the ______________. 247: Neap tides occur ____________. 248: What is the index error of sextant A in illustration D050NG? 250: Weather systems in the middle latitudes generally travel from _______. 251: A mid-channel buoy, if lighted, will show a ___________. 252: A large automated navigational buoy, such as those that have replaced some lightships, would be shown on a chart by which symbol? 253: Loran-C is which type of system? 254: The range of tide is the __________. 255: On March 17, at 0500 zone time, you cross the 180th meridian steaming eastward to west longitude. What is your local time? 256: The belt of light and variable winds between the westerly wind belt and the northeast trade winds is called the ______________. 257: Spring tides occur ___________. 258: You are enroute to Savannah, GA, from Recife, Brazil. There is a strong N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter ______________. Error reading USCG question 259 weather charts. The symbol indicated at letter "Q" represents a _______________. 260: The National Ocean Service publishes the ___________. 261: You are heading out to sea in a buoyed channel and see a quick-flashing green light on a buoy ahead of you. In U.S. waters, you should leave the buoy ______________. 262: Which of the buoy symbols in illustration D032NG indicates a safe water mark? 263: Loran-C uses the multiple pulse system because __________. 264: Which of the four adjustable errors in the sextant is the principle cause of index error? 265: It is 1200 local time for an observer at 54ø E longitude. Which statement is TRUE? 266: The horse latitudes are characterized by __________________. 267: You are inbound in a channel marked by a range. The range line is 309ø T. You are steering 306ø T and have the range in sight as shown. The range continues to open. What action should you take? 268: The illustration shows the symbols used on radiofacsimile weather charts. The symbol indicated at letter "L" represents a ______________________. 269: The wind at Frying Pan shoals has been south-southwesterly at an average velocity of 30 knots. The predicted set and drift of the rotary current are 232ø at 0.8 knot. What current should you expect? 270: You are entering port and have been instructed to anchor, as your berth is not yet available. You are on a SW'ly heading, preparing to drop anchor, when you observe the range lights depicted in illustration D047NG on your starboard beam. You should ___________. 271: Your vessel is leaving New York harbor in dense fog. As the vessel slowly proceeds toward sea, you sight a green can buoy on the starboard bow. Which action should you take? 272: What does the symbol shown indicate on a chart? 273: Loran-C is which type of navigation system? 274: Which of the four adjustable errors in the sextant causes side error? 275: Which statement concerning illustration D010NG is correct? (Soundings and heights are in meters) 276: The region of high pressure extending around the Earth at about 35ø N latitude is called the ___________. 277: Your vessel goes aground in soft mud. You would have the best chance of refloating it on the next tide if it grounded at __________. 278: You are underway on course 050² T and your maximum speed is 11 knots. The eye of a hurricane bears 070² T, 80 miles from your position. The hurricane is moving towards 270² T at 19 knots. If you maneuver at 11 knots to avoid the hurricane, what could be the maximum CPA? 279: As a vessel changes course to starboard, the compass card in a magnetic compass _____________. 280: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks ___________________. 281: A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a __________. 282: The symbol which appears beside a light on a chart reads "Gp Fl R (2) 10 sec 160 ft 19M". Which characteristic describes the light? 283: Loran-C operates on a single frequency centered on _____________. 284: The marine sextant is subject to seven different types of errors, four of which may be corrected by the navigator. An error NOT correctable by the navigator is _________________. 285: The apparent wind is zero when the true wind is __________. 286: On the pole side of the trade wind belt, there is an area of high pressure with weak pressure gradients and light, variable winds. This area is called the _________. 287: The datum from which the predicted heights of tides are reckoned in the tide tables is the same as that used for the charts of the locality. The depression of the datum below mean sea level for Hampton Roads, Virginia is _____________. 288: When using a radar in a unstabilized mode, fixes are determined most easily from __________. 289: A position obtained by crossing lines of position taken at different times and advanced to a common time is a(n) _________________. 290: The true wind is from 330² T, speed 6 knots. You want the apparent wind to be 30 knots from 10² on your port bow. To what course and speed must you change? 291: A buoy marking a wreck will show a(n) _______. 292: The symbol which appears beside a light on a chart reads "Gp Fl R (2) 10 sec 160 ft 19M". Which characteristic does the light possess? 293: The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of _____________. 294: What is a nonadjustable error of the sextant? 295: The difference (measured in degrees) between the GHA of the body and the longitude of the observer is the _____________. 296: The wind flow from the horse latitudes to the doldrums is deflected due to __________________. 297: The tides in Boston Harbor generally _____________. 298: A great circle crosses the equator at 173ø E. It will also cross the equator at what other longitude? 299: Steady precipitation is typical of _______________________. 300: Which of the symbols shown represents a warm front? 301: In the U.S. Aids to Navigation System, lateral aids as seen entering from seaward will display lights with which characteristic? 302: Which symbol represents a 20-fathom curve? 303: A Loran-C receiver in operation first receives pulses from the _____________. 304: In order to remove index error from a sextant, you should adjust the ___________________. 305: IN REGION A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by a _____________. 306: Weather conditions in the middle latitudes generally move _________. 307: The time meridian that is used when computing the currents for Pensacola Bay, Florida, is _____________. 308: The wind at Frying Pan shoals has been west-northwesterly at an average velocity of 40 knots. The predicted set and drift of the rotary current are 323ø at 0.6 knot. What current should you expect? 309: You are underway on course 050² T and your maximum speed is 12 knots. The eye of a hurricane bears 120² T, 110 miles from your position. The hurricane is moving towards 285² T at 25 knots. What course should you steer at 12 knots to have the maximum CPA? 310: Which sextant shown has an index error of 3'30" off the arc? 311: You are steaming southward along the west coast of the United States when you encounter a buoy showing a flashing red light. The buoy should be left on ______________. 312: The depth of water on a chart is indicated as 23 meters. This is equal to _________________. 313: The Loran-C receiver _____________. 314: Which of these sextant errors is nonadjustable? 315: Which statement about the time diagram shown DO08NG is TRUE? 316: According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northwest wind, the center of low pressure is located to the ______________. 317: The time meridian used for tide computations in New York Harbor is _____________. 318: Vessels required to have an Automatic Radar Plotting Aid must have a device to indicate the _____________. Error reading USCG question 319 weather charts. The symbol indicated at letter "F" represents a _______________. 320: Sometimes foreign charts are reproduced by DMA. On such a chart, a wire-dragged, swept area may be shown in green or ____________. 321: Which buoy may be even numbered? 322: The chart symbol indicating that the bottom is coral is _____________. 323: The position accuracy of Loran-C degrades with increasing distance from the transmitting stations as ________________. 324: Index error of a sextant is primarily caused by __________. 325: What is the longitude of the geographical position of a body whose Greenwich hour angle is 210ø30'? 326: You are steaming west in the North Atlantic in an extratropical cyclonic storm, and the wind is dead ahead. According to the law of Buys Ballot, the center of low pressure lies to the ________. 327: When daylight savings time is kept the times of tide and current calculations must be adjusted. One way of doing this is to __________. 328: The direction of prevailing winds in the Northern hemisphere is caused by the ______________________________. 329: The symbols shown are used on radiofacsimile weather charts. Which symbol indicates a weather boundary? 330: You are taking bearings on two known objects ashore. The BEST fix is obtained when the angle between the lines of position is ___________. 331: What indicates a buoy that should be left to port when entering from seaward? (U.S. Aids to Navigation System) 332: Which chart symbol indicates the bottom is clay? 333: Loran-C stations transmit groups of pulses at specific times. The time interval between transmissions from the master station is the ________. 334: The index error is determined by adjusting the ____________. 335: What is the geographic longitude of a body whose GHA is 336: You are steaming eastward in the North Atlantic in an extratropical cyclonic storm and the wind is dead ahead. According to the law of Buys Ballot, the center of the low pressure lies ______________. 337: To predict the actual depth of water using the Tide Tables, the number obtained from the Tide Tables is __________. 338: The illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "N" represents ____________________. 339: The wind at Frying Pan shoals has been north-northeasterly at an average velocity of 30 knots. The predicted set and drift of the rotary current are 355ø at 0.8 knot. What current should you expect? 340: Information about the direction and velocity of rotary tidal currents is found in the ___________. 341: Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? 342: A polyconic projection is based on a __________________. 344: A marine sextant has the index arm set at zero and the reflected image of the horizon forms a continuous line with the actual image. When the sextant is rotated about the line of sight the images separate. The sextant has ___________________. 345: A navigator fixing a vessel's position by radar ________. 346: If your weather bulletin shows the center of a low pressure area to be 100 miles due east of your position, what winds can you expect in the Northern Hemisphere? 347: The illustration shows the symbols used on radiofacsimile weather charts. Which of these symbols indicates rain? 348: When using a radar in an unstabilized mode, fixes are determined most easily from _____________________. 349: The direction of the southeast trade winds is a result of the __________. 350: When making landfall at night, the light from a powerful lighthouse may sometimes be seen before the lantern breaks the horizon. This light is called the ___________. 351: Which buoy may be odd numbered? 352: Which chart projection would be most suitable for marine surveying? 354: In order to remove side error from a sextant, you should adjust the _________________. 355: During the month of October the Sun's declination is ______. 356: When facing into the wind in the Northern Hemisphere the center of low pressure lies _________________. 357: On 10 August 1983 you will dock near Days Point, Weehawken, on the Hudson River, at 1800 DST (ZD +4). The charted depth alongside the pier is 24 feet (7.3 meters). What will be the depth of water when you dock? 358: What will be the set of the rotary current at Nantucket Shoals at 1245 (ZD +5) 14 January 1983? 359: You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233ø T, and bears 264ø T, 68 miles from you. What is the time to intercept if you make 13 Knots? Error reading USCG question 360 weather charts. The symbol indicated at letter "M" represents _______. 361: As your vessel is heading southward along the east coast of the United States, you encounter a buoy showing a red flashing light. How should you pass this buoy? 362: Which statement about a simple conic chart projection is TRUE? 364: What causes the error of collimation with regards to the four adjustments to a sextant? 365: The Sun at a maximum declination north would be approximately at ______________. 366: If an observer in the Northern Hemisphere faces the surface wind, the center of low pressure is to his______________. 367: What will be the time after 0800 EST (ZD +5) that the height of the tide at South Freeport, ME, will be 6.0 feet (1.8 meters) on 7 November 1983? 368: A great circle crosses the equator at 134ø E. It will also cross the equator at what other longitude? 369: You are underway on course 050² T and your maximum speed is 11 knots. The eye of a hurricane bears 070² T, 80 miles from your position. The hurricane is moving towards 270² T at 19 knots. What course should you steer at 11 knots to have the maximum CPA? 370: Prevailing winds between 30² N and 60² N latitude are from the __________________. 371: Which buoy may be odd numbered? 372: You would find the variation on a polyconic projection chart __________. 374: There are seven sources of error in the marine sextant. Of the four errors listed, which one is adjustable? 375: If the Sun's observed altitude is 47ø50', the zenith distance is _____. 376: According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northeast wind the center of low pressure is located to the ______________. 377: Determine the height of the tide at 2045 EST (ZD +5) at Augusta, ME, on 8 March 1983. 378: A navigator fixing a vessel's position by radar _________. 379: The steady current circling the globe at about 60ø S is the __________. 380: Prevailing winds between 30ø N and 60ø N latitude are from the _______________. 381: A nun buoy will _______________. 382: Which would you consult for information about the general current circulation in the North Atlantic Ocean? 384: Which is a nonadjustable error of the sextant? 385: The difference of latitude (l) between the geographic position (GP) of a celestial body and your position, at the time of upper transit, is represented by _____. 386: Your vessel is on course 180² T speed 22 knots. The apparent wind is from 70² off the port bow, speed 20 knots. The true direction and speed of the wind are ______________. 388: You are underway on course 120² T and your maximum speed is 12 knots. The eye of a hurricane bears 150² T, 120 miles from your position. The hurricane is moving towards 295² T at 20 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA? 389: The edge of a hurricane has overtaken your vessel in the Gulf of Mexico, and the northwest wind of a few hours ago has shifted to the west. This is an indication that you are located in the __________. 390: During the winter months, the southeast trade winds are ________. 391: When outbound from a U.S. port, a buoy displaying a flashing red light indicates ____________. 392: A pilot chart does NOT contain information about ________. 393: If your position is LAT 25ø N, LONG 35ø W, what is the correction you would apply to an RDF bearing received from a transmitting station in LAT 30ø N, LONG 40ø W? 394: An instrument designed to maintain a continuous record of atmospheric pressure is a(n) _________________. 395: If the Sun's observed altitude is 27ø12', the zenith distance is _____. 396: Your vessel is on course 150² T, speed 17 knots. The apparent wind is from 40² off the starboard bow, speed 15 knots. What is the speed of the true wind? 397: The mean tide level at Peaks Island, ME, is _____. 398: The velocity of the apparent wind can be less than the true wind and from the same direction, if certain conditions are present. One condition is that the ___________. 399: Where will you find information about the duration of slack water? 400: Information about the currents for the Pacific Coast of the U. S. are found in the _____. 401: You are steaming in a westerly direction along the Gulf Coast. You see ahead of you a lighted buoy showing a red isophase light. Which action should you take? 402: All of the following can be found on a Pilot Chart EXCEPT information concerning the ______________. 403: Your position is LAT 20ø00' N, LONG 45ø00' W when you take a radio bearing on a ship in distress in LAT 15ø00' N, LONG 40ø00' W. Your RDF bearing corrected for calibration error is 135.6ø T. What is the rhumb line course to rendezvous with the vessel in distress? 404: An aneroid barometer is an instrument _____________________. 405: At upper transit, if the zenith distance is 34ø, the geographical distance from the observer to a body's GP is _____. 406: Your vessel is on course 135² T speed 18 knots. From the appearance of the sea you estimate the speed of the true wind as 24.5 knots. The apparent wind is 40² on the starboard bow. Determine the speed of the apparent wind. 407: What would be the height of the tide at Crisfield, MD, at 0310 DST (ZD +4) on 6 May 1983? 408: A buoy bears 176ø T at 3000 yards. What is the course to make good to leave the buoy 100 yards to port? 409: On November 1st the zone time is 1700 EST (ZD +5) in LONG 75ø W. What is the corresponding zone time and date in LONG 135ø E? 410: The height of the tide at low water is 0.0 feet. The range is 9.0 feet. The duration is 06h 00m. The height of the tide 02h 12m before high water will be _________________. 411: When entering from seaward, a buoy displaying a single-flashing red light would indicate ____________. 412: If you were sailing in the North Pacific and were interested in the ice and iceberg limits, you could find this information in the __________. 413: You would need to apply the conversion angle to an RDF bearing, prior to plotting the bearing on a chart, when the ship and the station are both on ______________. 414: The barometer is an instrument for measuring the __________. 415: If the Sun's observed altitude is 54ø30', what is the zenith distance? 416: A ship is on course 195ø at a speed of 15 knots. The apparent wind is from 40ø on the port bow, speed 30 knots. The direction and speed of the true wind are _____________. 417: On 6 July 1983, at 1830 DST (ZD +4), what will be the predicted height of tide at Newburgh, NY? 418: In most cases, the direction of the apparent wind lies between the bow and ____________. 419: The ocean bottom that extends from the shoreline out to an area where there is a marked change in slope to a greater depth is the ________. 420: You are inbound in a channel marked by a range. The range line is 309ø T. You are steering 306ø T and have the range in sight as shown. The range continues to open. What action should you take? 421: Daylight savings time is a form of zone time that adopts the time _____________. 422: If you are sailing from the East Coast of the United States to the Caribbean Sea, which publication would contain information on weather, currents, and storms? 423: You have calibrated your RDF. When compiling the calibration table, the correction to be applied to any future RDF bearings is listed against the ______________. 424: For an accurate barometer check, you would ________________. 425: 90ø - Ho = _____. 426: The wind speed and direction observed from a moving vessel is known as _________________. 427: On 23 March 1983, at Kingston Point, NY, what is the earliest time after 1700 EST (ZD +5) that the predicted tide will be +2.0 feet? 428: A buoy bears 178ø T at 3000 yards (2700 meters). What is the course to make good to leave the buoy 100 yards (90 meters) to starboard? 429: A great circle crosses the equator at 127ø W. It will also cross the equator at what other longitude? 430: The southeast trade winds actually blow toward the ________. 431: When a buoy marks a channel bifurcation, the preferred channel is NOT indicated by ______________. 432: When using a Lambert conformal chart in high latitudes, angles such as bearings are measured in reference to ______________. 433: You are swinging ship to calibrate the RDF. The gyro error is 2ø W. The RDF gyro bearing of a station is 308ø at the same time the visual bearing is 307ø. At the time of the bearing, you are heading 270ø T. When you prepare the calibration chart, you would indicate the _______. 434: The purpose of the "set" hand on an aneroid barometer is to _______. 435: If an observer is at 35ø N latitude, his zenith is _____. 436: A wind vane on a moving vessel shows _________________. 437: Your vessel will be docking at Chester, PA, during the evening of 22 April 1983. The chart shows a depth of 20 feet (6.1 meters) at the pier. What will be the depth of water available at 1856 EST (ZD +5)? 438: Your longitude is 124² E, and your local mean time is 0520 on the 5th of the month. The mean time and date at Greenwich is _________. 439: If a weather bulletin shows the center of a low pressure system to be 100 miles due east of you, what winds can you expect in the Southern Hemisphere? 440: You are inbound in a channel marked by a range. The range line is 309ø T. You are steering 306ø T. The range appears as shown and is closing. Which action should you take? 441: A yellow buoy may exhibit a(n) _____________. 442: In very high latitudes, the most practical chart projection is the _____________. 443: You are swinging ship to calibrate the RDF. The RDF gyro bearing is 054ø at the same time the visual bearing is 053ø pgc. Gyro error is 1ø W. At the time of the bearings the heading was 339ø pgc. Which statement about the calibrations are TRUE? 444: A sylphon cell is a part of a ________________. 445: The values of the Greenwich hour angle and declination, tabulated in all almanacs, are for the _________________. 446: The usual sequence of directions in which a tropical cyclone moves in the Southern Hemisphere is ______________. 447: On 27 April 1983, at 1105 DST (ZD +4), what will be the predicted height of tide at Falkner Island, CT? 448: Mean high water is the reference datum used to measure ____. 449: You are enroute to assist vessel A. Vessel A is underway at 5 knots on course 063ø T, and bears 136ø T at 78 miles from you. What is the course to steer at 13 knots to intercept vessel A? 450: You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter ________. 451: Which light characteristic can be used on a special purpose mark? 452: When navigating in high latitudes and using a chart based on a Lambert conformal projection, ______________. 453: The quadrantal correction to be applied to an RDF bearing is determined ______________. 454: On what does the operation of an aneroid barometer depend? 455: The height of eye correction is smaller than geometrical dip because of ____________. 456: Which condition exists in the eye of a hurricane? 457: Find the height of the tide at Port Wentworth, GA, on 5 October 1983, at 1840 DST (ZD +4). 458: The prevailing westerlies of the Southern Hemisphere blow 18-30 knots _______________________. 459: A buoy bears 178ø T at 3000 yards (2700 meters). What is the course to make good to leave the buoy 100 yards (90 meters) to port? 460: When using horizontal sextant angles of three objects to fix your position, an indeterminate position will result in which situation? 461: Under the U.S. Aids to Navigation System, a yellow buoy may _______. 462: For what purpose would using a Lambert conformal chart be more convenient than using a Mercator? 463: The signal transmitted by a radiobeacon station is called its ____________________. 464: Prior to reading an aneroid barometer, you should tap the face lightly with your finger to _________________. 465: When applying a dip correction to the sighted sextant angle (hs), you always subtract the dip because you are correcting _____________. 466: In the relatively calm area near the hurricane center, the seas are ______________. 467: At what time after 1400 EST (ZD +5), on 4 January 1983, will the height of the tide at Port Wentworth, GA, be 3.0 feet? 468: Which of the symbols in illustration D018NG represents a cold front? 469: Where are the prevailing westerlies of the Southern Hemisphere located? 470: You are underway on course 120ø T and can make 12 knots. The eye of a hurricane bears 150ø T at 120 miles. The hurricane is on course 295ø at 20 knots. What course should you steer at 12 knots to have the maximum CPA? 471: Yellow lights may appear on ______________. 472: Which conic projection chart features straight lines which closely approximate a great circle? 473: The quadrantal error of a radio bearing is caused by __________. 474: Which indication on the barometer is most meaningful in forecasting weather? 475: A correction for augmentation is included in the Nautical Almanac corrections for _________________. 476: Tropical cyclones normally form within which of the following belts of latitude? 477: Determine the height of the tide at 1430 EST (ZD +5) at New Bedford, MA, on 10 April 1983. 478: The velocity of the apparent wind can be more than the true wind, and come from the same direction, if certain conditions are present. One condition is that the __________. 479: You are enroute to assist vessel A. Vessel A is underway at 5 knots on course 063ø T, and bears 136ø T at 78 miles from you. What is the course to steer at 13 knots to intercept vessel A? 480: What kind of pressure systems travel in easterly waves? 481: A special mark (yellow buoy), if lighted, may exhibit which light rhythm? 482: Which statement about a gnomonic chart is correct? 483: Coral atolls, or a chain of islands at right angles to the radar beam, may show as a long line rather than as individual targets due to ______. 484: The needle of an aneroid barometer points to 30.05 on the dial. This indicates that the barometric pressure is _________________________. 485: A phase correction is applied to observations of ________________. 486: Tropical cyclones do not form within 5² of the Equator because ______________. 487: What will be the time after 0600 (ZD +3), on 6 March 1983, that the height of the tide at Puerto Rosales, Argentina, will be 9.0 feet (2.7 meters)? 488: A great circle crosses the equator at 93ø W. It will also cross the equator at what other longitude? 489: You are anchored in the Aleutian Island chain and receive word that a tsunami is expected to strike the islands in six hours. What is the safest action? 490: You are underway on course 050² T and your maximum speed is 10 knots. The eye of a hurricane bears 100² T, 90 miles from your position. The hurricane is moving towards 285² T at 19 knots. Which course should you steer at 10 knots to have the maximum CPA? 491: A special purpose buoy shall be ______________. 492: Which type of projection is formed if a plane is tangent to the Earth, and points are projected geometrically from the center of the Earth? 493: The picture shown represents the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE? 494: Barometers are usually calibrated to indicate atmospheric pressure in ___________________. 495: A semidiameter correction is applied to observations of _________. 496: Severe tropical cyclones (hurricanes, typhoons) occur in all warm-water oceans except the ________________. 497: What will be the time after 0300 (ZD +4), on 5 March 1983, when the height of the tide at Port of Spain, Trinidad, will be 2.5 feet (.76 meters) ? 498: What is an advantage of the magnetic compass aboard vessels? 499: Which of the symbols in illustration D018NG represents an occluded front? 500: The National Imagery and Mapping Agency would produce a chart of the coast of ________. 501: Which of the buoys listed below could be used to mark an anchorage? 502: A gnomonic projection is based on a(n) _____________. 503: You are approaching a light fitted with a RACON. The light may be identified on the radar by _____. 504: Barometer readings in weather reports are given in terms of pressure at _______________. 505: The error in the measurement of the altitude of a celestial body, caused by refraction, increases as the _______________. 506: You are to sail from Elizabethport, N.J., on 22 May 1983, with a maximum draft of 28 feet. You will pass over an obstruction in the channel near Sandy Hook that has a depth of 26.5 feet. The steaming time from Elizabethport to the obstruction is 1h 40m. What is the earlies