大连海事大学船舶安全管理教案6:light and signal.ppt

大连海事大学船舶安全管理教案6:light and signal.ppt

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大连海事大学船舶安全管理教案6:light and signal

6 Lights and shapes Rule 20~ Rule 31 6.1 application (Rule 20) In all weather: sunshine, cloudy, rain,snow, … Lights: sunset ~ sunrise; shapes: by day(sunrise to sunset + twilight) No other light: light can be mistaken for the lights specified in these rules ; light that may impair their visibility or distinctive character, or interfere with the keeping of a proper look out 6.2 Definition (Rule 21) Masthead light Side light Stern light Towing light All-round light Flashing light 6.3 visibility 6.4 lights exhibited by various vessels Power driven vessel under way(rule 23) Towing and pushing(rule 24) Sailing vessels underway and vessel under oars Fishing vessels(rule 26) Vessels not under command or restricted in their ability to maneuver(rule 27) 6.4 lights exhibited by various vessels Vessels constrained by their draught(rule 28) Pilot vessels(rule 29) Anchored vessels and vessels aground(rule 30) seaplanes(rule 31) Power driven vessel Power driven vessel Power driven vessel Air-cushion vessel Power driven vessel less than 12 meters in length Power driven vessel less than 7 meters , speed less than 7 knots Fishing vessel Fishing vessel(trawling) Fishing vessel(trawling) Fishing vessel(other than trawling) Vessel constrained by her draught Vessel constrained by her draught Vessel at anchor Vessel at anchor Vessel at anchor Vessel aground Vessel aground Power driven vessel( underway) Pilot Vessel not under command(not making the way through water) Restricted in her ability to maneuver Sailing vessel Towing Towing Towing * * 2 2 2 3 Flashing light 2 2 2 3 All-round light 2 2 2 3 Towing light 2 2 2 3 Stern light 1 2 2 3 sidelight 2 3 5 6 masthead L﹤12 12≤L﹤20 20≤L﹤50 L≥50 Visibility(nm) Type of lights

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