I understand that dry docks (or graving docks) were used for both construction and maintenance of larger ships, but what was the the size cutoff when a drydock would be used to construct a new warship versus manufacturing it in a yard and launching it on a slipway? My impressions is that by WW2 all new battleships needed to be manufactured in a graving dock, but what about cruisers and destroyers? I have seen references to a particular dry dock being able to fit multiple destroyers, so I know dry docks were used with destroyers, but was that only for maintenance of new construction too? Same question for repairs--I assume destroyers and larger needed a drydock for repairs, but what about sloops, Destroyer Escorts, etc.?