(6.63 m) Propulsion: Sails and steam engine Complement: 40 officers and men Armament: 2 X 12-pounder (5 kg) cannons March 3, 1863 Three new ironclad monitor joined the USS Montauk in her next attack on Fort McAllister. The USS Passaic , commanded by Capt. Percival Drayton , the USS Patapsco ,