While the discovery of Myola alleviated one of the problems associated with resupply, it did not solve them all. Air drops requested during the second battle at Kokoda were delayed by weather—which frequently interfered with air operations over the range. At the start of the campaign, effective air dropping techniques had not been developed. Belated drops to Kokoda were made by fighters because of the lack of transports. Belly tanks were filled with supplies but this could not be widely used. Parachutes were not initially available and, after a quantity were delivered in mid-September, remained in short supply and were reserved for essential equipment. Most supplies were "free dropped". Packaging was primitive by modern standards. Supplies were wrapped in blankets or tied in sacks. There was, however, a conscious choice to utilise packing, such as blankets, that were required by the troops and might otherwise have been supplied separately. The rate of breakage and loss was high—on average, 50 per cent and up to 90 per cent. Lieutenant Fayle, Allen's aide-de-camp, commented that: "The whole fact of the matter, and NGF seemed unable to understand all through the campaign, was that recoveries were never 100 per cent of the supplies dropped and wastage was at times terrific."