Shapes.

During daylight hours vessels should display a black shape or shapes that assists other vessels to identify them and assess what activity they are engaged in, and consequently their ability to maneouvre.

	A vessel at anchor should display a black sphere, in the case of a sailing vessel it is usually hoisted on the front stay.
	A sailing vessel that is motor sailing should display an inverted black cone. Usually displayed on the front stay.
	A vessel that is not under command should display two black spheres, one vertically above the other.
	A fishing vessel should display two black cones one vertically above the other, the upper one should be inverted.
	If a fishing vessel has nets out 150metres or more, an additional black cone should be displayed on the side of the vessel from which the nets are extended.
	A fishing vessel may sometimes use a basket instead of the normal shape.
	A vessel that is constrained by draught, should display a black cylinder. However they often neglect to do so.
	When a vessel is engaged in towing another vessel and the tow is 200 metres or over in length. Both vessels should display a black diamond.
	An operational minesweeper should display three black spheres in the configuration shown.
	A vessel that is unable to manoeuvre, should display two black spheres and a black diamond. Hoisted vertically one above the other, with the diamond taking centre place.
	A vessel over 12 metres in length that has run aground, should display three black spheres vertically above each other.
	A working vessel such as a dredger, should display the unable to maneouvre shapes, two spheres with a diamond between them. Two additional diamonds are shown on the side of the vessel that is safe. The two spheres are hoisted on the dangerous or working side.