A survey of a trawler which sank off the Caithness coast with the loss of all seven crew members 30 years ago is due to take place.
The operation aims to obtain more detailed information about the state of the Peterhead-registered Trident.
Relatives of the crew have fought a long campaign to have the boat raised.
The results of the survey will help to determine what action will be taken by the Advocate General for Scotland, Lynda Clark.
The families claimed the original inquiry held after the Trident sank in October 1974 failed to examine its stability and suitability to have gone to sea in the first place.
The purpose of the new "limited" survey is not to disturb or alter the wreck but to increase current knowledge of several aspects about it, a spokeswoman for the advocate general said.
"This will aid the advocate general in subsequent decision making concerning further evidence gathering activities," she added.