National Maritime Center Providing Credentials to Mariners (Sample Examination) Page 1 of 8
Choose the best answer to the following Multiple Choice questions. 1. On 1 September your 1115 zone time DR position is LAT 25 20.0'N, LONG 28 24.0'W. At that time, you observe the Sun bearing 160.5 psc. The chronometer reads 01h 14m 58s, and the chronometer error is 01m 17s fast. The variation is 13.5 W. What is the deviation of the standard compass? (A) 2.1 E o (B) 4.1 E o (C) 11.0 W o (D) 11.0 E 2. Ice concentration is measured in tenths. What concentration range of ice corresponds to "Close Pack"? o (A) 9-10 tenths (B) 7-8 tenths o (C) 4-6 tenths o (D) 1-3 tenths If choice B is selected set score to 1. 3. When is the phenomenon known as a "seiche" most likely to occur on Lake Erie? o (A) During the passage of a rapidly moving warm front o (B) When the Moon and Sun are in alignment o (C) Only during the months of May through August (D) When strong winds from the Northeast suddenly diminish 4. Your vessel is being assisted through an ice field in Thunder Bay by the Canadian Coast Guard icebreaker Alexander Henry. The starboard lookout reports that the icebreaker has run up the code flag "N" (November). Which action should you take? (A) Stop your engines o (B) Reduce speed o (C) Reverse your engines o (D) Stop your vessel instantly Page 2 of 8
5. On the Great Lakes, which can cause short-term fluctuations in water levels? o (A) Calm winds o (B) Below normal rain fall (C) Seiches o (D) Steady barometric pressure 6. Which term describes the force exerted by a propeller which tends to throw the stern right or left? o (A) Slip o (B) Rotational force o (C) Thrust (D) Sidewise force 7. On 23 June in DR position LAT 21 39.0'S, LONG 106 28.0'W, you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 078 psc. The chronometer reads 02h 14m 39s and is 01m 43s slow. Variation in the area is 9 W. What is the deviation of the standard magnetic compass? o (A) 2.8 E o (B) 3.9 W (C) 4.3 W o (D) 4.6 E 8. What does the line labeled "MS" indicate on the Great Lakes load line model shown in illustration D031DG below? o (A) Midseason o (B) Mean sea level o (C) Maximum submergence (D) Midsummer 9. Using the Guidance Manual for Loading the M.V. Grand Haven, determine the amount of ballast required in tank No. 3 (P & S) to maintain drafts of 17'-00" forward and 22'-06" aft for a vessel loaded with grain which has a test weight of 34 lbs. o (A) 1150 tons each o (B) 1180 tons each (C) 1220 tons each o (D) 1250 tons each Page 3 of 8
10. The propeller on a vessel has a diameter of 25.3 feet and a pitch of 23.2 feet. What would be the apparent slip if the vessel cruised 515 miles in a 23 hour day (observed distance) at an average RPM of 93? o (A) +5.2% o (B) +3.6% o (C) -3.6% (D) -5.2% 11. There are basically three categories of water level fluctuations on the Great Lakes. What is NOT included as one of these? o (A) Short period fluctuations o (B) Seasonal fluctuations (C) Controlled outflow fluctuations o (D) Long range fluctuations 12. When is the effect of wind on exposed areas of the vessel most noticeable? o (A) When turning o (B) When going full ahead o (C) When going slow ahead (D) When backing 13. Which single-letter signal, when used by icebreakers on the Great Lakes, may be made by using the ship's whistle? (A) M o (B) E o (C) I o (D) None 14. Assuming that the recommended hatch loading sequence is followed, how many long tons of iron ore may be loaded through hatch No. 1 while using a single belt loader to arrive at a desired mean keel draft of 29'-11"? (use the Guidance Manual for Loading M.V. GRAND HAVEN) (A) 2230 tons o (B) 2270 tons o (C) 2310 tons o (D) 2350 tons Page 4 of 8
15. Most of your vessel's superstructure is forward. How will the vessel lie when drifting with no way on? o (A) With the wind off the starboard beam (B) With the wind from abaft the beam o (C) With the wind off the port beam o (D) With the wind from ahead If choice B is selected set score to 1. 16. Assume that your vessel has just entered Lake Erie by way of the Welland Canal and is proceeding in a southwesterly direction. Which statement about the aids to navigation you can expect to encounter along the route is TRUE? o (A) All red even-numbered buoys should be kept on your port side when proceeding in this direction. o (B) Lighted aids, fog signals, and radio beacons maintained by Canada are not included in the Great Lakes Light List. (C) The characteristics of buoys and other aids are as if "returning from seaward" when proceeding in this direction. o (D) All aids are maintained by the U.S. Coast Guard, 9th Coast Guard District, Cleveland, Ohio. 17. The propeller on a vessel has a diameter of 23.7 feet and a pitch of 24.8 feet. What would be the apparent slip if the vessel cruised 442 miles in a 23 hour day (observed distance) at an average RPM of 89? o (A) -7.6% o (B) -11.8% (C) +11.8% o (D) +7.6% 18. In which situation could a vessel most easily capsize? o (A) Anchored with your bow into the seas o (B) Running into head seas o (C) Running with following seas (D) Running in the trough Page 5 of 8
19. You have steamed 264 miles and consumed 22.0 tons of fuel. If you maintain the same speed, how many tons of fuel will you consume while steaming 521 miles? o (A) 31.7 tons o (B) 85.7 tons o (C) 38.6 tons (D) 43.4 tons 20. You have steamed 499 miles at 21 knots and are burning 462 barrels of fuel per day. You must decrease your consumption to 221 barrels per day with 311 miles left in your voyage. What must you reduce your speed (kts) to in order to burn this amount of fuel? (A) 18.4 o (B) 17.3 o (C) 20.0 o (D) 19.1 21. Which describes nearly half of all storms that enter the Great Lakes Basin during the period from October through May? o (A) Highs which originate in the east and east central USA o (B) Highs which originate in north eastern and eastern Canada o (C) Lows which originate in north central and western Canada (D) Lows which originate in the central and western USA 22. Which statement is FALSE with regards to the Great Lakes Light List? o (A) Volume VII does not include information on Class III private aids to navigation. o (B) The Light List should be corrected each week from the appropriate Notice to Mariners. (C) The Light List does not contain information on any of the navigational aids maintained by Canada. o (D) The Light List does not include Coast Guard mooring buoys, special purpose buoys, or buoys marking fish net areas. 23. Which publication offers information on Great Lakes ice services? o (A) National Weather Service, Ice Outlooks o (B) Light List volume VII o (C) Marine Weather Log (D) U.S. Coast Pilot #6 Page 6 of 8
24. What is the meaning of a flag hoist consisting of the code letters "WM" (Whiskey Mike) when displayed by an icebreaker? o (A) "I am going ahead; follow me." o (B) "You should stop your vessel instantly." o (C) "Icebreaker support is finished." (D) "Icebreaker support is now commencing." 25. You are heading into the sea during rough weather. What may happen if there is too much weight forward in your small boat? o (A) The craft will broach (B) The craft may plunge into the wave o (C) The craft will list severely o (D) The craft will rise rapidly over the wave If choice B is selected set score to 1. Page 7 of 8
National Maritime Center Providing Credentials to Mariners D031DG 5/23/2016 Adapted for testing purposes only Further reproduction prohibited without permission Page 8 of 8