United States Navy

====United States Coast Guard====
{{main|United States Coast Guard}}
[[File:Flickr - Official U.S. Navy Imagery - U.S. Coast Guard helicopters land aboard USS Wasp..jpg|thumb|right|A U.S. Coast Guard helicopter preparing to land on the flight deck of the amphibious assault ship {{USS|Wasp|LHD-1|6}}]]

The [[United States Coast Guard]], in its peacetime role with the [[Department of Homeland Security]], fulfills its law enforcement and rescue role in the maritime environment. It provides [[Law Enforcement Detachments]] (LEDETs) to Navy vessels, where they perform arrests and other law enforcement duties during naval boarding and interdiction missions. In times of war, the Coast Guard may be called upon to operate as a service in the Navy.<ref>{{cite web |url=https://www.law.cornell.edu/uscode/text/14/3- |website=[[Legal Information Institute]] |publisher=[[Cornell University Law School]] |title=14 USC 3. Relationship to Navy Department |access-date=28 July 2013}}</ref> At other times, Coast Guard [[Port Security Unit]]s are sent overseas to guard the security of ports and other assets. The Coast Guard also jointly staffs the Navy's naval coastal warfare groups and squadrons (the latter of which were known as harbor defense commands until late-2004), which oversee defense efforts in foreign littoral combat and inshore areas.