Skilled pilots landed the high-wing C123s on the unimproved runway surface at Nueva Guinea onto a sod runway surface not much wider than the fuselage and landing gear of the large aircraft. The high wings extended over meter high berms along each side of the runway. Part way into the mission, a bulldozer was airlanded by the C123K aircraft. The bulldozer was used to extend the runway and over-run area and some levelling of the berms along the runway length was accomplished. This was done in order to increase runway safety.