Photo showing a a USCG Maritime Security Response Team (MSRT). Note the amount of tactical gear the MSRT is equipped with. This gear includes nomex fire-retardent flgiht suits, kevlar vests, assault webbing, knee pads, helmet with balistic protection, eye protection, gloves and balaclavas. Typical weapons include M4 / CQBR carbines and Colt 1911 pistols.
Maritime Security Response Teams are a U.S. Coast Guard Deployable Specialized Force (DSF) and are part of the Deployable Operations Group. MSRTs are a maritime counterterrorism unit that are trained to deal with terrorist attacks against vessels and maritime facilities. They are on a a proactive, first response posture.
U.S. Coast Guard photo by Petty Officer 2nd Class Patrick Kelley