an 11 metres in lenght power-driven vessel underway may exhibit: two masterhead lights, sidelights and sternlight.

a power-driven vessel when towing shall exhibit (the length of the tow exceeds 200 metres): four masterhead lights, sidelights and towing light.

a vessel of less than 50 metres in length when engaged in trawling and when making way through the water may exhibit: one all-round green light, one all-round red light, one masthead light, sidelights and sternlight.

a vessel restricted in her ability to manoeuvre, except a vessel engaged in mine operations, when at anchor, shall exibit: two all-round red lights and one all-round white light.

a 25 metres in length sailing vessel underway shall exhibit: one all-round red light and one all-round green light.