National Maritime Center

Transcription

1 National Maritime Center Providing Credentials to Mariners (Sample Examination) Page 1 of 6

2 Choose the best answer to the following Multiple Choice Questions. 1. The following questions are based on Chart 13205TR, Block Island Sound, and the supporting publications. Your draft is 12 feet (3.6 meters) Your height of eye is 16 feet (4.8 meters) Gyro error is 2 W Variation is 15 W "Per standard magnetic compass" is abbreviated "psc" Per gyrocompass is abbreviated pgc DEVIATION TABLE Magnetic Heading Deviation E E E E E W W W W W E At 0520 you take the following observations: Point Judith Light 036 pgc Point Judith Harbor of Refuge Main Breakwater Center Light 312 pgc What is the position of your 0520 fix? (A) LAT 'N, Long 'W o (B) LAT 'N, Long 'W o (C) LAT 'N, Long 'W o (D) LAT 'N, Long 'W Page 2 of 6

3 2. Point Judith Harbor of Refuge. o (A) West Gap has a controlling depth of 24 feet (B) is entered through the East Gap or the West Gap o (C) has a maximum depth of 14 feet (4.3 meters) at MHW o (D) is used mostly by towing vessels If choice B is selected set score to At 0520, you are on course 243 pgc at 12 knots. What is the course per standard magnetic compass? o (A) 262 psc o (B) 233 psc o (C) 227 psc (D) 258 psc If choice D is selected set score to The coastline between Point Judith and Watch Hill is. o (A) low and marshy o (B) heavily forested (C) sandy and broken by rocky points o (D) marked by waterfalls from the highland ponds 5. In clear weather, you will lose sight of Point Judith Light at what distance? (use charted range of 20 nm as nominal range) (A) 14.0 nm o (B) 12.6 nm o (C) 10.3 nm o (D) 9.2 nm 6. At what time will you cross the 60 foot curve if you make good 12 knots? o (A) 0544 o (B) 0541 o (C) 0534 (D) 0527 If choice D is selected set score to 1. Page 3 of 6

4 7. The two wavy magenta lines running to Green Hill Point represent. o (A) prohibited fishing areas (B) submarine cables o (C) fish trap areas o (D) recommended approaches to Green Hill Point If choice B is selected set score to At 0600 you take the following bearings: Point Judith Light bearing 064 pgc Block Island North Light bearing 142 pgc What is your 0600 position? (A) LAT 'N, LONG 'W o (B) LAT 'N, LONG 'W o (C) LAT 'N, LONG 'W o (D) LAT 'N, LONG 'W 9. What was the current between 0520 and 0600? o (A) 178 at 1.2 knot o (B) 358 at 0.8 knot (C) 358 at 1.2 knots o (D) 178 at 0.8 knot 10. From your 0600 position, what is the course per gyrocompass to leave Watch Hill Light abeam to starboard at 2.0 miles if a southerly wind is producing 3 of leeway? o (A) 254 pgc o (B) 257 pgc (C) 261 pgc o (D) 251 pgc Page 4 of 6

5 11. At 0645, Watch Hill Point (left tangent) bears pgc at 2.75 miles. What was the speed made good between 0600 and 0645? o (A) 8.1 knots o (B) 9.8 knots (C) 10.3 knots o (D) 11.4 knots 12. At 0705, you take the following bearings: Watch Hill Light pgc Latimer Reef Light pgc Race Rock Light pgc What was the true course made good between 0645 and 0705? (A) 253 T o (B) 266 T o (C) 256 T o (D) 263 T 13. At 0705, you change course to head for The Race. You wish to leave Race Rock Light bearing due north at 0.4 mile. If the current is 110 T, at 2.8 knots, and you are turning for 12.0 knots, what course (pgc) should you steer? o (A) 257 pgc o (B) 252 pgc (C) 271 pgc o (D) 265 pgc 14. You are bound for New London. Where will you cross the demarcation line and be governed by the Inland Rules of the Road? o (A) You are already governed by the Inland Rules. o (B) Above the Thames River Bridge (C) In the Race o (D) You will not be governed by the Inland Rules. Page 5 of 6

6 15. In order to check your compasses, you sight North Dumpling Island Light in line with Latimer Reef Light bearing 077 pgc. The helmsman was steering 307 pgc and 320 per standard magnetic compass at the time. Which statement is TRUE? (A) The magnetic compass error is 14 W. o (B) The deviation based on the observation is 15 W. o (C) The gyro error by observation is 2 E. o (D) The true line of the range is 079. Page 6 of 6