Originally Posted by Dsanduril
I'd like to know where this comes from? There is nothing in the USCG regs or COLREGS that says anything about one meter from deck
Navigation Rules Online
There are several annexes to COLREGS that end up at:
The colored Sidelights, green on the starboard side and red to port, should be installed above the deck level and clear of any combings.
The masthead or all-round light must be installed at least one meter / 3.3 ft above the sidelights.
The masthead or all-round white light, and the white stern light must be located as close as practically possible to the vessel's fore and aft centreline.
The only "one meter" requirement is the steaming light be above the sidelights. Ask the surveyor
for chapter and verse.
Give the required annex a read ANNEX I: INTERNATIONAL POSITIONING & TECHNICAL DETAILS OF LIGHTS & SHAPES
it prescribes in detail the required light scheme, and is made part of the rules of the road.