The navigator/bomb-aimer would perform the latter of these roles in a prone position within the aircraft's nose. For bomb-aiming, a drift sight, camera, and steering control over the auto-pilot were provided; directly above this position was the front turret position of the bomber. Just aft of the wireless operator's position, the centre section of the wing cut across the fuselage; the space above this was used for storing oxygen tanks while the space below was used as a rest bunk. Behind the rest area, the uninterrupted deck ran across the full length of the bomb cells to the location in which the retractable ventral turret was installed upon early production aircraft; the internal area aft of this position were used to store flame floats and reconnaissance flares, as well as an escape hatch, lavatory, rear turret position, and the crew entry door on the port side.