A safe water mark may be __________.?
A) vertically striped B) spherical C) showing a white light D) All of the above E)NULL
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What would be the height of the tide at Crisfield, MD, at 0310 DST (ZD +4) on 6 May 1983?
A) 0.1 foot B) 0.5 foot C) 1.1 feet D) 1.6 feet E)NULL
The latitude of the upper vertex of a great circle is 36°N. What is the latitude of the lower vertex?
A) 36°N B) 0° C) 36°S D) Cannot be determined from the information given E)NULL
What lights would you see on the Illinois water way when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?
A) Red over green B) Green over red C) Red over amber (yellow) D) Green over amber (yellow) E)NULL
Yesterday your chronometer read 03h 01m 56s at the 1500 GMT time tick. Today your chronometer read 03h 01m 58s at the 1500 GMT time tick. What is the chronometer error?
A) 03h 01m 58s fast B) 01m 58s fast C) +2s D) -2s E)NULL
Loran-C operates on a single frequency centered on __________.?
A) 100 kHz B) 500 kHz C) 1,850 kHz D) 1,950 kHz E)NULL
Which magnetic compass corrector(s) CANNOT be set on a heading of magnetic east or magnetic west?
A) Heeling magnet B) Flinders bar C) Fore-and-aft magnets D) All of the above can be set on magnetic east or magnetic west headings. E)NULL
A sextant having an index error that is “off the arc” has a __________.?
A) positive correction B) dip error C) negative correction D) semidiameter error E)NULL
The needle of an aneroid barometer points to 30.05 on the dial. This indicates that the barometric pressure is __________.?
A) 30.05 inches of mercury B) 30.05 millimeters of mercury C) 30.05 millibars D) falling E)NULL
A phase correction is applied to observations of __________.?
A) the Sun B) stars C) planets D) All of the above E)NULL