In the horizon system of coordinates what is equivalent to the parallels of declination of the celestial equator system?
A) Vertical circles B) Parallels of altitude C) Zenith distance D) Azimuth angle E)NULL
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The datum from which the predicted heights of tides are reckoned in the tide tables is __________.?
A) mean low water B) the same as that used for the charts of the locality C) the highest possible level D) given in table three of the tide tables E)NULL
Where will you find information about the duration of slack water?
A) American Practical Navigator B) Sailing Directions C) Tide Tables D) Tidal Current Tables E)NULL
You will transit the Cape Cod Canal on 7 November 1983. If you arrive at the R R Bridge at 1655 EST (ZD +5), for what period of time during your transit will you have currents of not more than 0.5 knot?
A) 1631 to 1719 B) 1638 to 1655 C) 1648 to 1702 D) 1655 to 1709 E)NULL
A parallax correction is NOT applied to observations of the __________.?
A) stars B) Moon C) Sun D) Planets E)NULL
Which compensates for induced magnetism in the horizontal soft iron of a vessel?
A) Iron spheres mounted on the binnacle B) A single vertical magnet under the compass C) The Flinders bar D) Magnets in trays inside the binnacle E)NULL
Under the IALA-B Buoyage System, when entering from seaward a lateral system buoy to be left to starboard may display which topmark in illustration D046NG?
A) A B) B C) C D) D E)NULL
The dew point is reached when the __________.?
A) temperature of the air equals the temperature of the seawater B) atmospheric pressure is 14.7 lbs. per square inch C) relative humidity reaches 50% D) air becomes saturated with water vapor E)NULL
You take a bearing of 313° and 076° of two objects. Which bearing of a third object will give the best fix?
A) 014° B) 133° C) 255° D) 339° E)NULL
On the approach of a warm front the barometric pressure usually __________.?
A) falls B) rises C) is steady D) is unreliable E)NULL