Police Scotland today notes the convictions of Mitchell Cross, 26, and Alasdair Kelly, 28, for being concerned in the supply of cannabis and cannabis resin into Shetland.
Both had pleaded guilty in November to drug offences when they appeared at Lerwick Sheriff Court.
Cross has now been jailed for four years, while Kelly was sentenced to two years and four months imprisonment.
Their conviction follows a painstaking enquiry carried out by CID officers in Shetland following the recovery of a substantial quantity of cannabis which was recovered over the weekend of December 17/18, 2016.
Detective Sergeant Bruce Peebles said: "Both men played significant parts in this elaborate, though ultimately botched drug sourcing and dealing operation.
"The recovered drugs were thrown by Mitchell Cross, into Lerwick harbour from a passing vessel, and were then recovered from the water by Alasdair Kelly, before ultimately being recovered by police later that day.
"Painstaking enquiries were carried out involving witnesses, CCTV, travel agencies, local businesses, forensic DNA examination, mobile telephony and national financial institutions, with all of the evidence pointing to the guilt of both the accused in this clearly planned and pre-meditated operation.
"As a result, more than £28,000 worth of Class B drugs was recovered and prevented from being supplied within the local Shetland community.
"This enquiry demonstrated that as well as those based in the mainland of Britain, locally based criminals are also responsible for bringing drugs, on this occasion on a very large scale, into Shetland.
"This will not be tolerated and will be investigated thoroughly on all occasions by the Police in Shetland."
Anyone with information can contact Police Scotland on 101 or call Crimestoppers on 0800 555 111.