 The Pathfinders would be marking for a force of 56 Lancaster crews selected from 5 Group's squadrons and the job required accuracy of ‘the highest order.’ The marking tactics would be left to the Pathfinder captains themselves.Rodley recalled, ‘We decided that the best way we could tackle this target would be to find a landmark on Lake Constance which we could pick up in night conditions, and make a timed run across the lake to find the Zeppelin sheds.’ 

It was decided that Jones and Munro should aim to arrive one minute ahead of the others and at higher altitude.As they made landfall at Friedrichshafen they would begin dropping flares.