A Safety Zone is a water area, shore area, or water and shore area to which, for safety or environmental purposes, access is limited to authorized persons, vehicles, or vessels. It may be stationary and described by fixed limits or it may be described as a zone around a vessel in motion.
source: CGD 79-034, 47 FR 29660, July 8, 1982, unless otherwise noted.
cite as: 33 CFR 165.20