Day Shapes

Balls, cones, diamonds and cylinders shown by day in place of lights, under Rule 24 and Rule 30.

Not Under Command (NUC)

Rule 27(a)

Two black balls vertical

Night: two all-round RED lights

RAM (Restricted in Ability to Manoeuvre)

Rule 27(b)

Ball – Diamond – Ball vertical

Night: Red-White-Red all-round

Vessel Constrained by Draught

Rule 28

Cylinder

Night: three all-round RED lights

At Anchor

Rule 30(a)

One black ball forward

Night: white all-round light forward

Aground

Rule 30(d)

Three black balls vertical

Night: anchor lights + two RED lights

Trawling

Rule 26(a)

Two cones apex together (⧓)

Night: green over white all-round

Fishing (not trawling)

Rule 26(b)

Two cones apex together; + cone apex-up toward gear if it extends > 150 m

Night: red over white all-round

Tow > 200 m

Rule 24(c)

Diamond shape aloft

Night: three masthead lights forward

Sailing + Engine (Motor-sailing)

Rule 25(e)

Cone, apex down, forward

Night: normal power vessel lights

Minesweeping

Rule 27(f)

Three black balls: one at foremast head, one at each fore-yardarm end

Danger 1000 m ahead, 500 m each side

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