No fatalities

Flying Boat Strikes Uncharted Reef During Takeoff (NZ4111)

Te Whanga Lagoon (Chatham Island), New ZealandTakeoff (climb)

On November 1, 1959, a Short S.25 Sunderland (registration NZ4111) operated by Royal New Zealand Air Force - RNZAF was involved in an aviation accident near Te Whanga Lagoon (Chatham Island), New Zealand during takeoff. No fatalities were reported. Investigators recorded the probable cause as: Collision with a submerged reef while taking off. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 8 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Source recordUpdated 2026-09-03Data APIEditorial standards

A flying boat under the command of F/Lt B. Dwyer struck an uncharted, submerged reef while taking off from Te Whanga Lagoon. The impact severely damaged the hull, leading to the aircraft's abandonment and dismantling, with no casualties reported.

Incident Overview and Command Details The incident involved a flying boat operating under the command of F/Lt B. Dwyer. During the takeoff phase from Te Whanga Lagoon, the aircraft encountered an uncharted, submerged reef. The collision occurred as the aircraft was attempting to become airborne from the lagoon's waters. ## Damage and Aftermath The impact with the submerged reef caused severe damage to the flying boat's hull. Despite the extent of the structural damage, there were no casualties reported in the incident. Following the collision, the aircraft was deemed damaged beyond repair. It was subsequently abandoned at the site and later dismantled. ## Official Findings The official investigation identified the probable cause of the incident as a collision with a submerged reef while taking off. The uncharted nature of the reef was a key factor in the occurrence of the accident.