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- Mate (Oceans or Near Coastal (Uninspected Fishing Industry Vessel)) »
- Q192 - Navigation Problems: Chart Plot
16. The following questions are based on Chart 12221TR, Chesapeake Bay Entrance, and the supporting publications. The draft of your vessel is 9.0 feet (2.75 meters) Gyro error is 2°W Variation is 10°W «Per standard magnetic compass» is abbreviated «psc» «Per gyrocompass» is abbreviated «pgc»
DEVIATION TABLE
Magnetic Heading Deviation
000° 1.5°E
030° 2.0°E
060° 1.0°E
090° 0°
120° 1.0°W
150° 1.5°W
180° 2.5°W
210° 1.5°W
240° 1.0°W
270° 0.5°W
300° 0°
330° 0.5°E
On 31 July, you are anchored at LAT 37°22.4'N, LONG 75°39.9'W You get underway at 0240 enroute to Yorktown, VA What is the course psc from the anchorage to point A located 0.5 mile east of Cape Charles Lighted Bell Buoy 14?
The correct course is 194psc. This is determined by converting the charted true course of 206 using a 10W variation and a 2W deviation, resulting in a standard magnetic compass course of 194psc.
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