National Maritime Center

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1 National Maritime Center Providing Credentials to Mariners Q163 Navigation Problems-Chart TR (Sample Examination) Page 1 of 5

2 Choose the best answer to the following Multiple Choice Questions. Each question is completely independent of any other question on this exam. The following information is applicable to all questions. The following questions should be answered using chart TR, Block Island Sound, and the supporting publications. "Per standard magnetic compass" is abbreviated "psc" Per gyrocompass is abbreviated pgc Variation is 15 W DEVIATION TABLE Magnetic Heading Deviation E E E E E W W W W W E 1. Your position is 3 miles due east of Montauk Point Light. What is the course to steer to arrive at LAT 'N, LONG 'W, if you are turning for 8.7 knots, the current is 130 at 1.2 knots, and a northerly wind causes 3 of leeway? (A) 102 T o (B) 108 T o (C) 112 T o (D) 105 T Page 2 of 5

3 2. Sounding contours in unshaded water areas are at what interval? o (A) 10 foot up to 100 ft depths then at 30 foot intervals o (B) 10 fathom intervals o (C) The interval will vary to ensure any major underwater hazard is highlighted. (D) 30 foot intervals 3. You are on course 137 per standard magnetic compass when you take the following bearings: Watch Hill Point Light psc Montauk Point Light psc Race Rock Light psc What is your position? o (A) LAT 'N, LONG 'W o (B) LAT 'N, LONG 'W o (C) LAT 'N, LONG 'W (D) LAT 'N, LONG 'W 4. At 1016 your position is LAT 'N, LONG 'W. At 1116 your position is LAT 'N, LONG 'W. What was the course made good between the two positions? o (A) 135 T o (B) 143 T o (C) 140 T (D) 132 T 5. When approaching Block Island Sound from Long Island Sound, you will enter waters governed by the International Rules of the Road when you. (A) pass through The Race o (B) cross the territorial sea boundary o (C) exit Block Island Sound to the east or south o (D) None of the above, as Long Island Sound is governed by the International Rules of the Road Page 3 of 5

4 6. What is the time of the first PM (Daylight Savings Time) maximum ebb current at Plum Gut on 10 August 1983? (A) 1445 o (B) 1249 o (C) 1340 o (D) At 2038 your position is LAT 'N, LONG 'W. You are on course 301 per standard magnetic compass at 7.2 knots. At 2152 your position is LAT 'N, LONG 'W. What were the set and drift? (A) 096 T at 2.0 knots o (B) 261 T at 1.2 knots o (C) 277 T at 0.9 knot o (D) 080 T at 1.0 knot 8. At 0242 your position is LAT 'N, LONG 'W. You are turning for 9.3 knots. What is your ETA at the West Gap of Pt. Judith Harbor of Refuge? (A) 0336 o (B) 0325 o (C) 0329 o (D) You are on course 302 per standard magnetic compass when you sight Block Island Southeast Point Light in line with the Block Island Aero Beacon bearing 323 per standard magnetic compass. Based on this information which of the following should you do? o (A) know the deviation is 15 E o (B) swing your vessel to check the deviation table o (C) know the deviation is equal to the variation (D) know the deviation table is correct for that heading Page 4 of 5

5 10. Determine the course per standard magnetic compass from the entrance to Ninigret Pond (LAT 'N, LONG 'W) to the entrance to Great Salt Pond on Block Island. (A) psc o (B) psc o (C) psc o (D) psc Page 5 of 5

National Maritime Center

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