No, it was specifically designed as a corsair. GT introduced the converted rescue/patrol ship but I would have to check.
S:4 where it first appears says:
"Pirate characters may receive a corsair: an armed raiding ship. The referee may specify if the ship has a crew, or if it needs one.
Corsair (Type P): Based on the type 400 hull, the corsair is fitted out with jump drive-D, maneuver drive-F, and power plant-F, giving it a capability for jump-2 and 3G acceleration. A Model/2 computer installed, and contains a standard software package. Most important to this ship are the three triple turrets, although each turret is equipped with only one beam laser. Ten staterooms serve as quarters for the crew (pilot, navigator, three engineers, and assorted thugs and cutthroats numbering up to five more); twenty low berths are available for emergency use, or to hold captives. The ship is not streamlined, and there are no ship's vehicles or boats. Fuel capacity is 120 tons, and cargo capacity is 160 tons.
Notable features on the corsair are large cargo doors and variable identification features. The large clam-shell doors can open to reveal the entire cargo bay; the ship can accept a 100 to ship into its cargo bay. The ship has several centrally controlled identification features which can alter the shape and configuration of the ship at a moment's notice; fins retract or extend, modules appear or disappear, and radio emissions alter frequency and content. The ship's transponders can be altered to identify the vessel as having any of a variety of missions and identities.
The approximate value of the corsair is Cr180,000,000, but this price would be difficult to obtain on the open market, as the ship is of a noncommercial type, and its lineage and paperwork are of uncertain origin. It could probably bring about one quarter its value."