True heading differs from magnetic heading by __________.?
A) deviation B) variation C) compass error D) northerly error E)NULL
Arşivler Sorular
Variation in a compass is caused by __________.?
A) worn gears in the compass housing B) magnetism from the earth’s magnetic field C) magnetism within the vessel D) lack of oil in the compass bearings E)NULL
Vessels regularly navigating Ohio and Mississippi rivers above Cairo, Illinois, and their tributaries, shall at all times have on board a copy of __________.?
A) Tide Tables B) U.S. Coast Pilot C) U.S. Army Corps of Engineers Navigation Regulations (Blue Book) D) Sailing Directions E)NULL
A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. Which action should be taken to remove this error during compass adjustment?
A) If the red ends are to starboard you should raise the athwartships tray. B) If the red ends are to starboard, and the athwartships tray is at the bottom, you should remove some magnets. C) If the red ends…
There are seven sources of error in the marine sextant. Of the four errors listed, which one is adjustable?
A) Error of collimation B) Prismatic error C) Graduation error D) Centering error E)NULL
The compass rose on a nautical chart indicates both variation and __________.?
A) deviation B) annual rate of variation change C) precession D) compass error E)NULL
When crossing a front isobars tend to __________.?
A) change from smooth curves within the air mass to sharp bends at the front B) change from sharp bends within the air mass to smooth curves at the front C) pass smoothly across the front with no change D)…
You plot a fix using three lines of position and find they intersect in a triangle. The actual position of the vessel __________.?
A) is outside of the triangle B) may be anywhere in the triangle C) may be inside or outside of the triangle D) is the geometric center of the triangle E)NULL
A special daymark is a __________.?
A) red-and-white octagon B) daymark with a yellow stripe on it C) green square D) yellow diamond E)NULL
What publication contains information about the port facilities in Cadiz, Spain?
A) World Port Index B) United States Coast Pilot C) Nautical Index D) Sailing Directions E)NULL