Means of escape
Means of escape means a continuous and unobstructed way of exit travel from any point in a vessel to an embarkation station. A means of escape can be both vertical and horizontal, and include doorways, passageways, stairtowers, stairways, and public spaces. Cargo spaces, machinery spaces, rest rooms, hazardous areas determined by the cognizant Officer in Charge Marine Inspection, escalators, and elevators must not be any part of the means of escape.
46 CFR § 175.400
The following terms are used in this subchapter: