In the Northern Hemisphere, an area of counterclockwise wind circulation surrounded by higher pressure is a __________.?
A) low B) high C) warm front D) cold front E)NULL
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You must construct a Mercator plotting sheet on a piece of paper measuring 30″ by 32″. The area includes latitudes 31°10’S to 37°40’S and longitudes 007°00’W to 001°00’E. Allow a one-half inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitation?
A) 3.69 inches B) 3.52 inches C) 3.38 inches D) 3.26 inches E)NULL
Compass error is equal to the __________.?
A) deviation minus variation B) variation plus compass course C) combined variation and deviation D) difference between true and magnetic heading E)NULL
The expression “the air is saturated” means __________.?
A) the relative humidity is 100% B) the vapor pressure is at its minimum for the prevailing temperature C) precipitation has commenced D) cloud cover is 100% E)NULL
The Light List shows that a navigational light has a nominal range of 12 miles and a height above water of 25 feet (7.6 meters). Your height of eye is 30 feet (9.1 meters) and the visibility is 0.5 mile. At what approximate range will you first sight the light?
A) 0.5 mile B) 1.4 miles C) 5.2 miles D) 12.0 miles E)NULL
When steering a tow downstream around the shape of a sand bar, and staying on the proper side of the buoys, an operator should be cautious of __________.?
A) eddies under the bar B) swift current under the bar causing loss of control C) cross-currents pushing the tow away from the bar D) cross-currents pushing the tow into the bar E)NULL
If your weather bulletin shows the center of a low pressure area to be 100 miles due east of your position, what winds can you expect in the Northern Hemisphere?
A) East to northeast B) East to southeast C) North to northwest D) South to southeast E)NULL
The spinning motion of a planet around its axis is called __________.?
A) revolution B) rotation C) orbit D) space motion E)NULL
You are approaching a multiple-span bridge at night. The main navigational channel span will be indicated by __________.?
A) a quick flashing red or green aid to navigation B) a steady blue light in the center of the span C) 3 white lights in a vertical line in the center of the span D) a flashing green light…
The Flinders bar on a magnetic compass compensates for the __________.?
A) induced magnetism in vertical soft iron B) induced magnetism in horizontal soft iron C) permanent magnetism in ship’s steel D) vessel’s inclination from the vertical E)NULL