Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR
USCG General Navigation (Set 67)
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Question 1 of 30
You are on course 180°T and take a relative bearing of a lighthouse of 225°. What is the true bearing of the lighthouse?
Browse Questions in Set 67
30 MCQs #1 You are on course 180°T and take a relative bearing of a lighthouse of 225°. What is the true bearing of the lighthouse? #2 You take a bearing of 191° and 313° to two objects. Which bearing of a third object will give the best fix? #3 If the Sun's observed altitude is 47°50', the zenith distance is __________. #4 The parallel of latitude at 23°27'N is the __________. #5 You take a bearing of 086° of a lighthouse. What bearing of another object would give the best fix? #6 You take a bearing of 142° and 259° of two objects. Which bearing of a third object will give the best fix? #7 You are on course 209°T. In order to check the longitude of your vessel, you should observe a celestial body on which bearing? #8 You are on course 344°T and take a relative bearing of a lighthouse of 090°. What is the true bearing to the lighthouse? #9 What is the longitude of the geographical position of a body whose Greenwich hour angle is 210°30'? #10 You are proceeding up a channel at night. It is marked by a range which bears 185°T. You steady up on a compass course of 180° with the range in line dead ahead. This indicates that you(r) __________. #11 Your longitude is 179°59'W. The LMT at this longitude is 23h 56m of the 4th day of the month. Six minutes later your position is 179°59'E longitude. Your LMT and date is now __________. #12 At upper transit, if the zenith distance is 34°, the geographical distance from the observer to a body's GP is __________. #13 At about GMT 1436, on 3 December, the lower limb of the Moon is observed with a sextant having an index error of 2.5' on the arc. The height of eye is 32 feet. The sextant altitude (hs) is 3°38.8'. What is the observed altitude? #14 The arc of an hour circle between the celestial equator and a point on the celestial sphere, measured northward or southward through 90°, is the __________. #15 You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T and have the range in sight as shown in illustration D048NG below. Which action should you take? #16 You are on course 027°T and take a relative bearing to a lighthouse of 220°. What is the true bearing to the lighthouse? #17 You are on course 344°T and take a relative bearing of a lighthouse of 270°. What is the true bearing to the lighthouse? #18 You are on course 277°T and take a relative bearing of a lighthouse of 045°. What is the true bearing to the lighthouse? #19 You are on course 180°T and take a relative bearing of a lighthouse of 225°. What is the true bearing of the lighthouse? #20 You take a bearing of 176° of a lighthouse. Which bearing of another object would give the best fix? #21 What is the equivalent of 2° 35' in time units? #22 You are on course 357°T and take a relative bearing of a lighthouse of 180°. What is the true bearing to the lighthouse? #23 The points where the Sun is at 0° declination are known as __________. #24 The line of position determined from a sight with an observed altitude (Ho) of 88°45.0' should be __________. #25 The parallel of latitude at 66°33'N is the __________. #26 The parallel of latitude at 23°27'S is the __________. #27 What is the equivalent of 4°36' in time units? #28 The angle at the pole measured through 180°From the prime meridian to the meridian of a point is known as __________. #29 If the Sun's observed altitude is 27°12', the zenith distance is __________. #30 If an observer is at 35°N latitude, his zenith is __________.
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