There's a new lead suspect in the mystery of a boat wreckage found at the bottom of Picton Harbour.
Officers had thought the 10m-long wreck could be a yacht called the Sioux, which broke free of its Waikawa Bay mooring in a 2010 storm.
But after a dive squad arrived this week they confirmed it was a much older launch.
Police divers today took another look and now think it may have been a former pleasure craft called the Black Prince.
But they can't say with certainty and are calling for public help or any pictures of the vessel.
The Black Prince was a former commercial fishing boat that was converted during the `80s. It was nicknamed the Blue Submarine as fishing vessel.
The wreckage was found last week during a Defence Force training exercise.
Sitting 32m below the surface, the wreck has been hard to reach - especially with visibility in the area at about one metre.