Received a further email from my friend:
With ref. to the airstrip photo on my computer screen; several blokes reminded me that it is, of course, “Ononge”, further up in the Woitape valley.
Ononge is 08° 40' 49" S 147° 15' 66" E
ONG Cat 4 16/34 5,700 feet 500 m 7% down to SE
Land 34 Takeoff 16
Some parts of the strip are somewhat rough.
OPEN HOUSE