Personally I leave it set to depth below keel, to which I add 1.5 metres for actual depth. There is a special corner of hell reserved for the person who then reset it to actual depth and did not tell me or put it back again! Fortunately I had already slowed right down thinking ... surprised there's this much water here as we came to a sudden stop.
Since lateral means side, multilateral means basically many-sided. The philosophy of multilateralism claims that the best solutions generally result when as many of the world's nations as possible are involved in discussions, and multilateralists often favor strengthening the United Nations.
In security arrangements, the principles of multilateralism are best embodied in a collective security system such as NATO, in which a war against one state is considered to be a war against all states, ensuring that any act of aggression against a member of the collective system is met with a response from all members.