Proceedings Of The Marine

SUM 2015

Proceedings magazine is a communication tool for the Coast Guard's Marine Safety & Security Council. Each quarterly magazine focuses on a specific theme of interest to the marine industry.

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66 Proceedings Summer 2015 www.uscg.mil/proceedings A nswers Deck 1. A. A vessel towing astern Correct. Reference: International and Inland Rule 24. Rule 24(a) states "A power-driven vessel when towing astern shall exhibit: (i) Instead of the light prescribed in Rule 23(a)(i) or 23(a)(ii), two masthead lights in a vertical line. When the length of the tow, measuring from the stern of the towing vessel to the after end of the tow exceeds 200 meters, three such lights in a vertical line; (ii) sidelights; (iii) a sternlight; (iv) a towing light in a vertical line above the sternlight; and (v) when the length of the tow exceeds 200 meters , a diamond shape where it can best be seen" B. A vessel trawling Incorrect C. A vessel not under command Incorrect D. A vessel engaged in dredging operations Incorrect 2. A. fash point Incorrect B. fre point Incorrect C. autoignition temperature Correct. Reference: Chemical Data Guide for Bulk Shipment by Water, 1990 Edition, Page xii Autoignition temperature is defned as: "The minimum temperature required to ignite gas or vapor without a spark or fame being present." D. lower explosive limit Incorrect 3. A. 24 hours Incorrect B. 48 hours Incorrect C. 72 hours Incorrect D. Any amount of time Correct. Reference: 46 CFR 4.05-1 "(a) Immediately after the addressing of resultant safety concerns, the owner, agent, master, operator, or per- son in charge, shall notify the nearest Sector Offce, Marine Inspection Offce or Coast Guard Group Offce whenever a vessel is involved in a marine casualty consisting in—" "(6) An injury that requires professional medical treatment (treatment beyond frst aid) and, if the person is engaged or employed on board a vessel in commercial service, that renders the individual unft to perform his or her routine duties;" 4. A. 016° Incorrect B. 074° Incorrect C. 090° Incorrect D. 254° Correct. Reference: American Practical Navigator, 2002 Edition, Page 5 "A relative bearing is measured relative to the ship's heading from 000° (dead ahead) clockwise through 360°. However, it is sometimes conveniently measured right or left from 000° at the ship's head through 180°" in which case it is designated right or left." To convert a relative bearing to a true bearing: True Bearing = Relative Bearing + True Heading True Bearing = 270° + 344° = 614° True Bearing = 614° – 360° = 254°T

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