Shapes and Lights
Some types of vessel show special lights by night and shapes by day. They can help you to identify vessels that may require special actions on your part. For example, seeing a vessel displaying a 'Divers down' flag would prompt you to stay well clear and slow down; divers may be surfacing around that vessel.
Select an item..
- At Anchor
- Diver Down
- Motor Sailing
- No Command
- Pilot Boat
- Vessel Aground
- Vessel Fishing
- Vessel Trawling
Black ball forward, by day. By night all-round white light if over 50m, a second light aft and lower.
By day, letter 'A' international code. By night, the same lights as vessel restricted in its ability to manoeuvre: all round red, white, red lights in a vertical line plus normal steaming lights when underway.
By day, a cone pointing down, placed forward. By night, normal steaming lights.
By day, two black balls vertically. By night, two all-round red lights, plus sidelights and sternlight when making way.
By day, Letter 'H' international code. By night, all-round white light over all-round red plus sidelights and sternlight when underway
By day, ball, diamond, ball in a vertical line. By night all-round red, white, red lights in a vertical line plus normal steaming lights when underway.
For tows over 200m: by day, towing vessel and tow display diamond shapes. By night, vessel towed shows sidelights, sternlight and yellow towing light at stern. Towing vessel shows three masthead lights, sidelights sternlight and yellow towing light.
By day, three black balls in a vertical line; by night, anchor light(s) plus two all-round red lights in a vertical line.
By day, two cones pointing towards each other in a vertical line one above the other. By night, all-round red light over all-round white plus sidelights and sternlight when underway.
By day, two cones pointing towards each other in a vertical line one above the other. By night, all-round green light over all-round white light, plus sidelights and sternlight when underway.
Drag the shapes and lights to the correct boxes below.