High Flyer
Original caption: “An alert Coast Guardsman leaps into action as he covers his patrol. On the anti-saboteur patrolmen of the Coast Guard also protect vital cargoes on the piers awaiting shipment to the far-flung battle lines.”

Note the shore duty leggings, M1903 Springfield, and its attached 20-inch M1905 bayonet. USCG photo 26-G-89-049, via the National Archives.
Formed from scratch in 1942, the Coast Guard Beach Patrol employed about 24,000 men, aged 17 to 73, protecting 3,700 miles of coastline from potential enemy invasion during World War II. More on the subject in this excellent 124-page period chronicle.