National Maritime Center Providing Credentials to Mariners (Sample Examination) Page 1 of 5
Choose the best answer to the following Multiple Choice Questions. 1. The following questions are based on Chart 12221TR, Chesapeake Bay Entrance, and the supporting publications. The draft of your vessel is 14 feet (4.2 meters) Gyro error is 3 E Variation is 10 W "Per standard magnetic compass" is abbreviated "psc" Per gyrocompass is abbreviated pgc DEVIATION TABLE Magnetic Heading Deviation 000 2.0 E 030 1.0 E 060 0 090 0.5 W 120 1.0 W 150 2.0 W 180 2.0 W 210 1.0 W 240 0.5 W 270 0.5 E 300 1.5 E 330 2.5 E Your 1600 position is LAT 37 22.5'N, LONG 75 32.3'W. What is the approximate depth of water under the keel? o (A) 59 feet (17.3 meters) (B) 38 feet (11.5 meters) o (C) 45 feet (13.6 meters) o (D) 52 feet (15.8 meters) 2. If there is no current, what is the course per gyrocompass from your 1600 position to point A located 0.5 mile due east of Hog Island Lighted Bell Buoy "12"? o (A) 196 pgc o (B) 199 pgc (C) 193 pgc o (D) 190 pgc If choice C is selected set score to 1. Page 2 of 5
3. At 1630, you reach point A and come right to 204 T. Your engine speed is 12 knots. Your 1715, position is LAT 37 09.8'N, LONG 75 37.4'W. What was the current? o (A) 067 T at 1.1 knots (B) 067 T at 1.5 knots o (C) 246 T at 1.5 knots o (D) 246 T at 1.1 knots 4. From your 1715 fix, you steer 214 T at 12 knots. At 1800, you take the following bearings: Cape Charles Light bearing 296 T Cape Henry light bearing 242 T What is the latitude and longitude of your 1800 position? o (A) LAT 37 02.9'N, LONG 75 43.9'W o (B) LAT 37 03.1'N, LONG 75 42.8'W o (C) LAT 37 03.0'N, LONG 75 43.3'W (D) LAT 37 02.9'N, LONG 75 43.1'W 5. At 1815, your position is LAT 37 01.0'N, LONG 75 42.7'W. If there is no current, what is the course per standard magnetic compass to arrive at a point 0.3 mile due north of North Chesapeake Entrance Lighted Whistle Buoy "NCA" (LL#375)? o (A) 249.0 o (B) 251.5 (C) 257.0 o (D) 255.0 If choice C is selected set score to 1. 6. From your 1815 position, you want to make good a course of 263 T. Your engines are turning RPM for 12 knots. The current is 050 T at 1.9 knots. Adjusting your course for set and drift, at what time should you expect to enter the red sector of Cape Henry Light? o (A) 1854 o (B) 1849 o (C) 1859 (D) 1904 Page 3 of 5
7. At 1920, Cape Henry Light bears 225 pgc, and Chesapeake Channel Tunnel North Light bears 288 pgc. If your heading is 268 T, what is the relative bearing of Chesapeake Light? (A) 213 o (B) 205 o (C) 220 o (D) 194 8. Which statement concerning your 1920 position is TRUE? o (A) You can expect differences of as much as 6 from the normal magnetic variation of the area. o (B) You are governed by the Inland Rules of the Road. o (C) You are within the Chesapeake Bay Entrance traffic separation scheme. (D) You are entering a restricted area. 9. From your 1920 position, you change course to enter Chesapeake Channel between buoys 9 and 10. What is the course per standard magnetic compass (psc)? o (A) 286 psc (B) 283 psc o (C) 274 psc o (D) 280 psc 10. At 2000, your position is LAT 37 04.1'N, LONG 76 05.6'W. You change course for the Eastern Shore. At 2037, Old Plantation Flats Light bears 033 pgc, and York Spit Light bears 282 pgc. What was the course made good from your 2000 position? (A) 359 T o (B) 014 T o (C) 006 T o (D) 020 T Page 4 of 5
11. At 2037, you change course to make good a course of 016 T. There is no current, but a westerly wind is causing 3 leeway. What course per standard magnetic compass (psc) should you steer to make good the course 016 T? (A) 022 psc o (B) 025 psc o (C) 031 psc o (D) 028 psc 12. Your height of eye is 25 feet (7.6 meters). If the visibility is 5.5 nautical miles, what is the luminous range of Wolf Trap Light? (A) 7.5 miles o (B) 12.0 miles o (C) 17.0 miles o (D) 16.0 miles 13. If you want a more detailed chart of the area at your 2115 DR position, which chart should you use? (A) 12224 o (B) 12225 o (C) 12238 o (D) 12222 14. At 2123, your position is LAT 37 20.0'N, LONG 76 03.0'W. What is your distance offshore of Savage Neck? o (A) 4.3 miles (B) 1.7 miles o (C) 2.6 miles o (D) 3.4 miles 15. From your 2123 position, you are approximately 42 miles from Crisfield, MD. If you are making good a speed of 13 knots, at what time should you arrive at Crisfield, MD? o (A) 0148 o (B) 2359 o (C) 0112 (D) 0037 Page 5 of 5