Each crew member should have his own safety harness on board.
A safety harness is a device that prevents falling overboard.
You can purchase them singly or in combination with a lifejacket.
Some oilskins are nowadays equipped with a safety harness.
The crew member should know how to adjust the harness correctly and where to attach it to the boat.
It is of utmost importance that only strong points are used.
There are no special rules given as to when to wear a harness, but in the following situations a safety harness should be mandatory: in rough weather, at night, in restricted visibility, when a crew member is working aloft, over the side and when alone on deck.