 Rodley and Sauvage, following on, would pick out the Zeppelin shed by flarelight and mark it with Target Indicator bombs.Rodley recalled that the TIs were to be ‘alternate reds and greens, and when we got one on the roof of the sheds, we would broadcast to the Main Force to bomb the red or the green, as the case might be.’ In fact it would be Slee or Gomm who made the call.Low flying would be needed to avoid detection en route to the target, so the Pathfinder crews flew low-level cross-country exercises that night and the next, visiting the giant airship sheds at RAF Cardington, Bedfordshire.