The magnetic compass error which changes with the geographical location of your vessel is called __________.?
A) deviation B) variation C) compensation D) differentiation E)NULL
Arşivler Sorular
You are plotting a running fix. How many fixed objects are needed to take your lines of position from?
A) One B) Two C) Three D) None E)NULL
The prime vertical is the great circle on the celestial sphere that passes through the __________.?
A) celestial poles and the zenith B) zenith, nadir and the east point of the horizon C) celestial poles and the celestial body D) zenith, nadir and celestial body E)NULL
The period at high or low tide during which there is no change in the height of the water is called the __________.?
A) range of the tide B) plane of the tide C) stand of the tide D) reversing of the tide E)NULL
On 16 January 1981, you take a sight of a star. The sextant altitude (hs) is 4°33.0′. The temperature is -10°C, and the barometer reads 992 millibars. The height of eye is 42 feet. The index error is 1.9′ off the arc. What is the observed altitude (Ho)?
A) 4°10.2′ B) 4°14.3′ C) 4°17.0′ D) 4°24.1′ E)NULL
The magnitude of three stars is indicated. Which star is the brightest?
A) Canopus – 0.9 B) Vega + 0.1 C) Antares + 1.2 D) Cannot be determined; magnitude indicates size not brightness E)NULL
Information markers, when lighted, will display __________.?
A) yellow lights B) green lights C) white lights D) red lights E)NULL
Under the IALA-A Buoyage System, when entering from seaward a lateral system buoy to be left to port may display which topmark in illustration D046NG?
A) A B) B C) C D) D E)NULL
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 __________.?
A) latitude 50°S, 200 miles apart B) longitude 50°W, 150 miles apart C) the equator, 175 miles apart D) latitude 30°N, 50 miles apart E)NULL
The Light List shows that a navigational light has a nominal range of 19 miles and a height above water of 52 feet (15.8 meters). Your height of eye is 42 feet (12.8 meters) and the visibility is 10.0 miles. At what approximate range will you first sight the light?
A) 10.0 miles B) 16.0 miles C) 17.3 miles D) 19.0 miles E)NULL