Subsequently, the Royal New Zealand Air Force (RZNAF), the police and the Centre Observatory in Wellington conducted a joint investigation into the sightings of the Argosy. The results were stamped "top secret," and archived in the Wellington National Archives in Wellington. One investigator who participated in the investigation, called it a lesson in debunking. The New Zealand Press quoted him as saying:
"They discussed how to deal with the problem of (UFO) reports and they all agreed to cooperate and investigate... but not tell the public they were exchanging information. Secretly they were trying to figure it out. No one wanted to deal with the problem of UFO reporting. They didn't know what to do about them, partly through a lack of resources to adequately investigate them."
The sightings made by the Argosy have never been adequately explained.

