Pass Benchmark: 70% • Standard: USCG NMC / 46 CFR
USCG Deck Navigation (Supplementary) (Set 4)
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Question 1 of 30
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?
Browse Questions in Set 4
30 MCQs #1 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? #2 You plot a fix using three lines of position and find they intersect in a triangle. You should plot the position of the vessel __________. #3 You are outbound in a channel marked by a range astern. The range line is 273°T. You are steering 090°T and have the range in sight as shown in illustration D047NG below. What action should you take? #4 A facility used for the discharge of a cargo of a particular hazard, such as chlorine, butane or ethane, must have what to warn water traffic of an immediate danger during fire or cargo release? #5 In the horizon system of coordinates what is equivalent to the parallels of declination of the celestial equator system? #6 Some locations maintain a zone time of -13. What are the zone time and date if the Greenwich time and date are 2152, 10 January? #7 A plane that cuts the Earth's surface and passes through the poles will always form __________. #8 Except for N-S courses, and E-W courses on the equator, a great circle track between two points, when compared to a rhumb line track between the same two points, will __________. #9 On which route is a towing vessel over 39.4 feet in length NOT required to carry an echo-sounding device? #10 A backlash below a lock is defined as a __________. #11 The point on the celestial sphere that is directly below an observer is the __________. #12 Which publication(s) must a towing vessel of 12 meters or more in length carry when operating on US waters other than the Western Rivers? #13 Which navigational equipment is required to be tested and logged before a towing vessel embarks on a voyage of more than 24 hours? #14 A true bearing of a charted object, when plotted on a chart, will establish a __________. #15 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? #16 The LMT of LAN is 1210. Your longitude is 70°30'E. Which time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN? #17 A position obtained by applying ONLY your vessel's course and speed to a known position is a __________. #18 The owner or Master of a towing vessel must ensure that each person that directs and controls the movement of the vessel knows all of the following EXCEPT _________. #19 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 __________. #20 In the horizon system of coordinates what is the equivalent to the celestial equator of the celestial equator system? #21 Which instrument may a towing vessel, engaged in towing exclusively on the Western Rivers, use in place of a magnetic compass? #22 On March 17, at 0500 zone time, you cross the 180th meridian steaming eastward to west longitude. What is your local time? #23 You are on course 355°T and take a relative bearing of a lighthouse of 275°. What is the true bearing of the lighthouse? #24 A time diagram is a diagram of the celestial sphere as observed from above the __________. #25 An azimuth angle for a body is measured from the __________. #26 You are in a channel in U.S. waters near an industrial plant with a load/discharge facility for barges. You see an emergency rotating flashing light on the facility light up. What does this indicate? #27 The diameter of the Sun and Moon as seen from the Earth varies slightly but averages about __________. #28 Where do you find the semidiameter correction to be used to correct sextant observations of the stars? #29 When correcting apparent altitude to observed altitude, you do NOT apply a correction for __________. #30 On November 1st the zone time is 1700 EST (ZD +5) in LONG 75°W. What is the corresponding zone time and date in LONG 135°E?
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