Footage of large Merchant ship being fitted with an anti submarine gun.
Note: Locations of events unknown.
Full titles read: "MERCHANT MEN ARM AGAINST PIRATE MENACE"
Various shots of light gun being lifted onto and fitted onto deck of merchant ship to fend off enemy submarines. M/S Merchant seamen practising gun drill.
Cataloguer's note: It looks as though the Merchant seaman need some more practise !