Construction: Catoctin is Wheeler hull No. 193. Her hull is fully double-carvel planked with an outer layer of ¾” mahogany and an inner layer ½” red cedar. Her frames are sawn oak, 1-1/4” X 1-5/8” - 9” OC (typical). Her hull fastenings are #14 Silicon Bronze (Everdur) screws and are likely original to construction. Her floors are 1-1/2” thick as with bronze and steel fasteners to the frames. Her weather decks are now non-skid polymer with rainways and plywood sub-decking and would have originally been treated canvas.

Wheeler Shipbuilding Corp. constructed hundreds of wooden costal patrol and minesweeper vessels during WWII. Post war, it would appear that they continued to build their vessels to battle-ready standards.