Video from the U.S. Coast Guard District 11 shows their boat being tossed around by massive swells at Ocean Beach in San Francisco during training on December 13, 2018. Video courtesy: U.S Coast Guard.
ftw.usatoday.com/2018/12/coast-guard-training-in-massive-surf-captured-in-stunning-photos/amp?fbclid=IwAR2yzHM3F4Pnk6Si390cfJTyrgxzxOe0DJAKrYik-yGHoPlOJh7R-7ebP0w The people you see are about 15' above sea level.