SCIENTISTS are preparing to return to the wreck site of the Mary Rose.
They believe the monitoring equipment placed at the site earlier this summer may have been disturbed - either by fishing or by natural biological movement on the seabed.
Although most of the ship - which sank in The Solent in 1545 - was raised in 1982, many objects remain in the silt and it is a highly protected site, marked clearly by buoys.
Christopher Dobbs, the marine archaeologist leading the team, said the data monitoring equipment placed on the sea bed has stopped transmitting, and they need to find out why.
The dive is due to go ahead on September 22.