Prowler

"If you saw a prowler, it probably wasn't a prowler."

- Anonymous Prowler Corps officer

A prowler is a line of warship, represented by the hull classification symbol PRO. Originally, the term properly referred to the slipspace-capable reconnaissance ships used by the Office of Naval Intelligence. However, it has been adopted by many human organisations as a moniker for any ships that are similar in size to a corvette which are designed for covert operations.