A Peterhead trawler which sank with the loss of seven lives off Caithness 32 years ago is to be surveyed.
Some relatives of the Trident's crew have fought a long campaign to have the boat raised.
It had been claimed the original inquiry held after the Trident sank in 1974 failed to examine its stability and suitability to have gone to sea.
Aberdeen firm Subsea 7 has been chosen as the main contractor for a detailed, underwater seabed survey.
The Trident disappeared in October 1974 while in transit from the west coast of Scotland to her home port of Peterhead.
The wreck was discovered by amateur divers in 2001, then a formal investigation into the loss was re-opened.
The Advocate General for Scotland has responsibility for obtaining all relevant or potentially relevant evidence in relation to the causes of the loss.
It has been ruled the detailed underwater seabed survey of the wreck should take place to collect this evidence, which will include video images and measurements which could help to establish the probable cause.
The survey, which will take place in June, will be funded by the Department for Transport.
Shipping Minister Stephen Ladyman: "I hope that this will be of some comfort to the Trident families.
"Although of course there can be no absolute guarantee of success, both my department and Subsea 7 will be doing all we can to meet the objectives of the survey.
"I am optimistic that the survey will help to reach some firm conclusions concerning the loss of the Trident, and I wish the teams well in their task."
However Jeannie Ritchie, who lost her father and husband in the tragedy, told BBC Scotland: "We do not know how the department's going to do it but no way can they cut into that vessel.
"What's going to happen to the remains of seven men that are lying resting in the Trident?"