On a vessel of 65 feet (19.8 meters) or less in length, a window or windshield of sufficient size and proper accessibility may be used as one of the required means of escape from an enclosed space, provided it:
(a) Does not lead directly overboard;
(b) Is suitably marked; and
(c) Has a means to open the window or break the glass.
source: USCG-2006-24412, 81 FR 40101, June 20, 2016, unless otherwise noted.
cite as: 46 CFR 144.510