U. S. Coast Guard, United States Coast Guard, US Coast Guard - an agency of the Department of Transportation responsible for patrolling shores and facilitating nautical commerce

armed service, military service, service - a force that is a branch of the armed forces

armed forces, armed services, military, military machine, war machine - the military forces of a nation; "their military is the largest in the region"; "the military machine is the same one we faced in 1991 but now it is weaker"

coastguardsman - a member of a coastguard