National Maritime Center

Transcription

1 National Maritime Center Providing Credentials to Mariners (Sample Examination) Page 1 of 5

2 Choose the best answer to the following Multiple Choice Questions. 1. The following questions should be answered using Chart 12354TR, Long Island Sound - Eastern Part, and the supporting publications. Your draft is 12 feet (3.6 meters) Your height of eye is 25 feet (7.6 meters) Gyro error is 2 W Variation is 14 W "Per standard magnetic compass" is abbreviated "psc" Per gyrocompass is abbreviated pgc DEVIATION TABLE Magnetic Heading Deviation W W W W E E E E Your speed is 7.5 knots. You are in New Haven Outer Channel and sight the range markers in line directly over the stern. Your heading at the time is 168 psc. What is the magnetic compass error? o (A) 1 E o (B) 1 W (C) 14 W o (D) 0 Page 2 of 5

3 2. At 0720, you are in the outer channel between buoy "1" and buoy "2" and change course to pass Townshend Ledge Lighted Bell Buoy "10A" abeam to port at 0.1 miles. What is the course to steer per gyrocompass if a northerly wind causes 2 of leeway? (A) 114 pgc o (B) 116 pgc o (C) 120 pgc o (D) 118 pgc 3. At 0740, you obtain the following radar data: Branford Reef Light bears 068 T at 3.0 nm What is your position? o (A) LAT 'N, LONG 'W o (B) LAT 'N, LONG 'W (C) LAT 'N, LONG 'W o (D) LAT 'N, LONG 'W 4. From your 0740 position, you change course to pass 1.1 miles north of Falkner Island Light. Which of the following is true? (A) your course will keep you clear of the 18' shoal o (B) you will pass 1.5 nm off Branford Reef Light o (C) you should consult the sailing directions for pilotage requirements o (D) None of the above 5. At 0802, the radar range and bearing to Branford Reef Light are 350 pgc at 0.8 mile, and the north point of Falkner Island are 090 pgc at 6.7 miles. What were the set and drift that you encountered since 0740? o (A) Set 085 T, drift.2 knot (B) Set 085 T, drift.6 knot o (C) Set 265 T, drift.2 knot o (D) Set 265 T, drift.6 knot 6. Falkner Island Light is shown. o (A) with a six-second period o (B) 46 feet (13.9 meters) above sea level (C) from a white octagonal tower o (D) only from 1 June to 10 October Page 3 of 5

4 7. If there is no current, what is the course per standard magnetic compass from your 0802 fix to a position 1.1 miles north of Falkner Island Light? o (A) 068 psc (B) 095 psc o (C) 091 psc o (D) 064 psc 8. At 0830, you want the latest weather forecasts for the Falkner Island area. On what frequency do you set your FM radio for this information? o (A) Mhz o (B) 2182 khz (C) Mhz o (D) Mhz 9. At 0844, the range to the north end of Falkner Island is 2.0 miles and the left tangent bearing is 102 T. If the height of the tide is +1.0 foot, what is the approximate depth of the water under the keel? o (A) 22 ft (6.7 meters) (B) 19 ft (5.8 meters) o (C) 14 ft (4.2 meters) o (D) 29 ft (8.8 meters) 10. At 0925, you plot the following: Falkner Island Light bearing 252 T at 1.8 nm If you correct for a current setting 035 T at 0.5 knot, what true course will you steer from the 0925 position to arrive at a position 0.5 mile south of Long Sand Shoal West End Horn Buoy "W"? o (A) 089 T (B) 095 T o (C) 102 T o (D) 092 T Page 4 of 5

5 11. If you correct for the current in the preceding question (035 T at 0.5 knot) and maintain an engine speed of 7.5 knots, what is your ETA 0.5 mile south of buoy "W"? (A) 1021 o (B) 1026 o (C) 1016 o (D) At 0946, the radar range to Hammonasset Point is 2.5 miles. The range to the eastern most point of Falkner Island is 3.3 miles, and the range to Horton Point is 10.1 miles. What is your position at 0946? (A) LAT 'N, LONG 'W o (B) LAT 'N, LONG 'W o (C) LAT 'N, LONG 'W o (D) LAT 'N, LONG 'W 13. Long Sand Shoal. o (A) has gray sand with scattered shells o (B) shows breakers when northerly winds exceed 10 knots o (C) shoals gradually on the north and south sides (D) is hard and lumpy If choice D is selected set score to During extreme low water, the soundings near Saybrook may require corrections up to. o (A) 1 foot (+.3 meters) o (B) -2 feet (-.6 meters) (C) -3.5 feet (-1.1 meters) o (D) The sounding datum is based on extreme low water and no correction is necessary 15. As you enter New London Harbor, you are steering on the entrance range. The lights are in line over the bow as you are heading 352 pgc. What is the gyro error? o (A) 0 o (B) 1 W o (C) 3 W (D) 2 E If choice D is selected set score to 1. Page 5 of 5