It was created after the Vietnam War to give recognition to the specially trained naval personnel of the inshore boat units and river assault commands.
It shows a small craft circumscribed by anchor flukes on the sides and bottom and a three-star pennant on top.
The three stars represent the three main areas of U.S. Navy riverine operations in Vietnam: Game Warden, Market Time, and Sealords (Southeast Asia, Lakes, Oceans, Rivers and Deltas Strategy).
Enlisted personnel must have served as the Petty Officer in Charge (POIC) of a small craft for six months.
People who served on small craft during World War II may receive the pin by asking the Department of the Navy.