During a Navy exercise in Auckland’s Hauraki Gulf, 4 World War II mines were discovered by divers.
The mines were originally laid in September 1942 as part of a controlled defensive minefield.
Most mines were disposed of at the end of the war using mine sweepers, however around 50 sank to the bottom.
These mines were unable to be recovered until new technology was available.
The Navy believes that any remaining World War II mines are unlikely to be dangerous due to their age and condition, but recommend that divers are cautious if they ever find one.
Any mine discovery should be reported to the Harbourmaster or the Royal New Zealand Navy.
Article written by D Mulhern