Vessel over 50 metres, at anchor.
Bows view. (But see the image below for clarification)

Vessel over 50 metres, at anchor.
Port view. (Note that unlike steaming lights, the stern light is lower than the bows light).

Vessel under 50 metres, at anchor.
All views.

Memory Aids - I think we are all used to seeing ships at anchor with a black ball. Well a black light would be about as much use as a chocolate teapot, so we wisely use a white one!

Day Shapes
At anchor - a black ball.