Why would fitting each deck-mounted machine cannon to German fleet tankers require 2,500 dockyard hours?
Short answerThe figure is difficult to reconcile with installing a preassembled mount unless the estimate includes much more work than the stated gun fit.
NotesThe reported 2,500 dockyard hours for each deck-mounted machine cannon is difficult to reconcile with the stated work. A packaged mount would normally arrive assembled and be craned aboard rather than manufactured piece by piece on the ship. It would still need electrical power and an information connection, but the exchange cannot identify what would account for the full figure. The question helps separate the physical weapon installation from any wider, unstated integration burden in a procurement estimate.