THE LOST HEROES, BBC2
Working with a 1/6
scale model of the X-Craft, shots of the submarines underwater
were achieved 'dry-for-wet' by shooting in a dense smoke
environment. Particulate matter and plankton were achieved
camera' rather than by post production means.
the submarine was seen surfacing and submerging - plus views of
Tirpitz - were shot on a
shallow water tank.