TAILIEUCHUNG - Seamanship Techniques 2011 E Part 16

Tham khảo tài liệu 'seamanship techniques 2011 e part 16', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Seaman s Self-Examiner 303 Double lookouts should be employed throughout ice navigation with searchlights being used during the hours of darkness. The position of the vessel should be kept under regular observation and good communications with shore radio stations maintained. Probably the most vulnerable parts of any vessel navigating in heavy ice concentrations are the propellers especially when the vessel is moving astern and great care should then be observed. At no time should the vessel attempt to break through glacial ice. This type of ice formation is usually very large and extremely solid and should be given a wide berth. Should the vessel become stuck in ice then limited alternatives are open a go astern b put rudder midships and leave engines running ahead to clear ice floes astern or c transfer ballast and change trim to bring about the vessel s release. Masters should avoid using anchors if at all possible. Should the ice be moving there would be a distinct possibility of breaking the anchor cable for the cable and the ship s bow might act to trap large moving ice floes. It is dangerous to follow close inshore leads especially when an onshore wind is blowing. Ice convoys and the assistance of ice-breaker patrol ships are the obvious and safest guarantees of transit but these specialised ice strengthened vessels may not always be present when they are needed. 16. Qu. When siting the position of the ship s whistle in accordance with Annex III of the rules state why it should be positioned as high as practicable and if more than one whistle is fitted state when they would not be sounded simultaneously. Ans. Whistles should be positioned as high as practicable so as to transmit their signal as clearly as possible without interference from obstructions. If more than one whistle is fitted and the distance between them is more than 100 m they should not be sounded simultaneously. 17. Qu. You are navigating in a narrow channel when a vessel astern sounds two .

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