The concept of a Pathfinder force to lead the way for the bombers was opposed by Sir Arthur 'Bomber' Harris because the expert pilots and navigators it would involve were exactly the men that he needed to lead the ordinary squadrons. But once ordered to organise such a unit, Harris appointed Donald Bennett, an Australian Wing Commander, to lead it. Bennett had undertaken many long distance lights during the 30s, and had served in flying boats commanded by Harris, so he was a known quantity. The Pathfinders' Mosquitoes and Lancaster’s were packed with the latest navigational and bomb aiming equipment, saving the main force crews the problem of target location. Air Vice-Marshal Donald Bennett (above) was a natural choice to lead the Pathfinder Force. Its job was to position marker bombs (below) accurately on the target.