Lights required on boats

Navigation lights

Navigation lights must be positioned so they are not obscured by the vessels superstructure or interfered with by the deck lights.

Masthead

The masthead and/or all round white light must be fitted (if practical) on the centre line (bow to stern) of the vessel.

Vessels 12 metres to 20 metres

Must display one of the following:

• A masthead light, separate sidelights and stern light.
• A masthead light, combined sidelights and stern light.

The masthead light shall be carried at least 2.5 metres above the gunwale. Combined sidelights shall be carried at least 1 metre below the masthead light.

Optional lights

A sailing vessel of any length, which is fitted with sidelights and a stern light (but not a combined lantern) may, in addition, carry two all round lights in a vertical line at or near the top of the mast. The upper light must be red and lower green.

Vessels less than 50 metres in length at anchor, must display an all round white light placed where it may best be seen.

Anchor lights must always be shown from sunset to sunrise. If you are at anchor or in a busy area, then show additional lights to ensure you are seen and keep a good watch.

There are many other combinations of lights used on vessels. The lights shown relate to the activity the vessel is engaged in, for example: fishing, dredging, not under command.

Note: A simple rule of thumb for a small power boat is to stay clear of any vessels exhibiting additional lights.