Coast guard

A coast guard or coastguard is a maritime security organization of a particular country. The term embraces wide range of responsibilities in different countries, from being a heavily armed military force with customs and security duties to being a volunteer organization tasked with search and rescue without law enforcement authority. In most countries, a typical coast guard's functions are distinct from those of the navy (a military service) and the transit police (a law enforcement agency), while in certain countries has similarities to both.

USCG National Security Cutter USCGC Bertholf (WMSL-750) and an EADS HC-144 Ocean Sentry
Russian Coast Guard ship #183 Volga
A CH-149 Cormorant training with a Canadian Coast Guard cutter
A Chinese Coast Guard ship participating in an international exercise
Multi-purpose vessel Arkona of the German Federal Coast Guard
A Portuguese National Republican Guard Coastal Control Unit surveillance boat of the LVI type