Sailing and Motoring A vessel proceeding under sail which has her engine running shall exhibit forward where it can best be seen a conical shape, apex downwards.She shall exibit lights according to a power-driven vessel. Sailing and motoringDay signAbeam, port sideAheadAstern
Power-driven vessel underway A power-driven vessel underway shall exhibit: a masthead light forward;a second masthead light abaft of and higher than the forward one; except that a vessel of less than 50 metres in length shall not be obliged to exhibit such light but may do so;sidelights;a sternlight. Power driven vessel underway, longer than 50 mAbeam, port sideAheadAsternPower driven vessel underway, shorter than 50 mAbeam, port sideAheadAstern
Not under command A vessel not under command shall exhibit: Two all-round red lights in a vertical line where they can best be seen; Two spherical shapes in a vertical line where they can best be seen; and When making way through the water also normal sidelights and a sternlight (not shown in the example below). Vessel not under command, not making way through the waterDay sign (two black spheres)Abeam, port sideAheadAsternSailing boat, no wind, no mechanical propulsionAbeam, port sideAheadAstern
Dredging or underwater operations A vessel engaged in dredging or underwater operations, when restricted in her ability to manoeuvre Dredging or underwater operations, shorter than 50 m, not making wayAhead, day signsAheadAsternDredging or underwater operations, shorter than 50 m, making wayAhead, day signsAheadAsternDredging or underwater operations, longer than 50 m, making wayAhead, day signsAheadAstern
Restricted in her ability to Maneuver A vessel restricted in her ability to manoeuvre, except a vessel engaged in mine clearance operations, shall exhibit: three all-round lights in a vertical line where they can best be seen. The highest and lowest of these lights shall be red and the middle light shall be white; three shapes in a vertical line where they can best be seen. The highest and lowest of these shapes shall be balls and the middle one a diamond; when making way through the water, also a masthead light or lights, sidelights and a sternlight Restricted in her ability to manoeuvre, not making way through the waterDay sign: two black spheres…
Small Diving Vessels: How to Identify Them and Navigate Safely When operating a boat on inland waters, coastal areas, or the Great Lakes, recognizing special-purpose vessels is essential for safety. One of the most important vessels to identify correctly is a small diving vessel, as divers may be in the water nearby and vulnerable. Day Shapes and Flags for Small Diving Vessels A small diving vessel may display one of two internationally recognized signals during the day: International Code Flag “A” (Alpha)A blue-and-white swallow-tailed flag indicating that the vessel has a diver down and is restricted in its ability to maneuver. Other vessels must keep well clear and proceed at slow speed. Red-and-White…
Minesweeper A vessel engaged in mine clearance operations shall in addition to the lights prescribed for a power-driven vessel, or to the lights or shape prescribed for a vessel at anchor, exhibit three all-round green lights or three balls. One of these lights or shapes shall be exhibited near the mast head and one at each end of the fore yard. These lights or shapes indicate that it is dangerous for another vessel to approach within 1000 metres of the mine clearance vessel. Minesweeper, shorter than 50 mAhead, day signs (3 black spheres)AheadAstern
