Stornoway Lifeboat was launched at 7pm on Friday night (October 25th), after a call for help from Scottish Ambulance.
Stornoway Coastguard operations centre received the request for assistance when a 49-year-old man was reported to be suffering a possible cardiac issue aboard a fish-farm vessel in Stornoway harbour.
The crewman aboard the barge Beinn Dearg needed to be transferred to land, so the RNLI crew launched the lifeboat and took him to the inner harbour, where Stornoway Coastguard Rescue Team were waiting to help with the transfer from the Lifeboat pontoon to the ambulance.
The man was then taken onwards to Western Isles Hospital and all crews were stood down by 19.40.
The Beinn Dearg, which was brought into service by Mowi early this year, is one of a new generation of landing craft used for transporting hydrogen peroxide for treatment of amoebic gill disease (AGD).
Pictures show the Coastguard Rescue Team getting ready to transfer the casualty (Stornoway CRT) and the fish farm barge at launch (Mowi).