No. 5 Squadron Sunderland NZ4120 KN-Z with refueling barge '210' alongside, during Exercise Sea Demon at RAF Station Seletar.
This was a South East Asia Treaty Organisation (SEATO) exercise.
Image from the AH Wood personal collection. No. 4 Squadron Vincent NZ309, with rings and tail removed, on a barge being brought ashore upon arrival in Fiji.