Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR
USCG General Navigation (Set 47)
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Question 1 of 30
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 __________.
Browse Questions in Set 47
30 MCQs #1 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 __________. #2 The period of the Earth's revolution from perihelion to perihelion is the __________. #3 Miaplacidus is found in what constellation? #4 On 5 July, at 1200 zone time, you cross the 180th meridian steaming westward. What is your local time? #5 If the Sun's observed altitude is 47°50', the zenith distance is __________. #6 You are underway in an area where the charted depth is 8 fathoms. You compute the height of tide to be -4.0 feet. The draft of your vessel is 5.0 feet (1.52 meters). You determine the depth of the water beneath your keel to be __________. #7 In order to get the maximum benefit from the Gulf Stream, on a voyage between Houston and Philadelphia, you should navigate __________. #8 A semidiameter correction is applied to observations of __________. #9 The difference between the DR position and a fix, both of which have the same time, is caused by __________. #10 In the horizon system of coordinates what is equivalent to the Greenwich hour angle of the celestial equator system? #11 What must the owner or Master do if any of the towing vessel's required navigational safety equipment fails during a voyage? #12 The First Point of Aries is the position of the Sun on the celestial sphere on or about __________. #13 The immediate surroundings of what constellation contain the most first magnitude stars? #14 What is most likely to happen when you push a multiple tow into a countercurrent? #15 The difference (measured in degrees) between the GHA of the body and the longitude of the observer is the __________. #16 Towing vessels of more than 39.4 feet in length must carry charts or maps __________. #17 Fomalhaut is found in what constellation? #18 Bellatrix is found in what constellation? #19 You are on course 277°T and take a relative bearing of a lighthouse of 045°. What is the true bearing to the lighthouse? #20 The dividing meridian between zone descriptions -4 and -5 is __________. #21 Because the actual center of some planets may differ from the observed center, the navigator applies a correction known as the __________. #22 At morning stars, the last stars that should be observed are those with an azimuth in which quadrant? #23 A rock and sand structure extending from the bank of the river toward the channel is known as a __________. #24 Capella is found in what constellation? #25 You are outbound in a channel marked by a range astern. The range line is 133°T. You are steering 315°T and have the range in sight as shown in illustration D048NG below. What action should you take? #26 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? #27 What describes an accurate position that is NOT based on any prior position? #28 It is 1200 local time for an observer at 54°E longitude. Which statement is TRUE? #29 When attempting an upstream landing while pushing empty barges ahead in a hard onshore wind, the approach is best made __________. #30 You are in a channel in U.S. waters near an industrial plant with a load/discharge facility for barges. You hear a siren being sounded at the facility. What does this indicate?
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