Drawing S 584-162 was sent to the Chief Bureau of Construction and Repair on 12 October 1920 to the Chief of Naval Operations (CNO) after requested to do is. The request was done after the War College President received a letter of commodore D.C. Webb of the Civil Engineer Corps presenting the idea of a self-propelling dry dock to be used during naval campaigns outside the American waters. Webb was at that moment studying at the Naval War College. The dock was never constructed.
Dimensions 1.050’0” (over all)-115.0” (clear inside)-175.0” (over all) x 10’2½” with a normal displacement of 53.755 tons. Freeboard maximum at stem and A.P. and M.P. at side 104’9½”. Depth of centerhull 25’0” and depth between decks 10’0”. Turbo generators and electric motors were to supply 16.000 shp allowing a speed of 10 knots. To be fitted out with 4 boiler rooms. Length of compartments boiler room amidships 105’.0” and aft 52’6”en motor room 52’6”. Normal displacement of 53.755 ton: hull allow 42 tons each feet-44.100 ton, hull fittings 1.675 ton, steam engineering at 16.900 shp=300 ton, reserve feed 260 ton, equipment & outfit and 2/3 stores1.950 ton, fuel oil 2/3 full supply 2.600 ton and margin 1.870 ton.
Source the so-called Spring Styles Book 1 (March 1911-September 1925). Naval History and Heritage Command. Lot S-584. Preliminary designs prepared by mostly civilians working at the Bureau of Construction and Repair (succeeded by the Bureau of Ships nowadays the Naval Sea Systems Command) under supervision of naval architects of the Navy Construction Corps. A major part of the drawings is presented to the General Board which adviced the Secretary of the Navy.
