Aerial view of Seagrove Aerodrome (Seagrove was an airport located by Clarks Beach on the south shoreline of Manukau Harbour, New Zealand, near the small town of Waiuku.) and surrounding countryside and coast, Manukau Harbour, Auckland. Photograph taken in 1946 by Whites Aviation.

Seagrove Aerodrome was part of an RNZAF flying training station (RNZAF Station Seagrove) established during the Second world War. The station and runways were built in 1942 and operated as a training station from that year to 1944. Seagrove was also a base for the American Marine Corps from May to June 1943. After the war the site reverted to farmland.

https://en.wikipedia.org/wiki/Seagrove_Aerodrome