Details
Construction
Dimensions
History
SEAMARK is a Pilot Vessel of steel construction powered by twin 480 BHP Lister-Blackstone diesel engines and was built by PK Harris of Appledore in 1959.
The vessel is believed to be the longest serving pilot cutter in the UK, having served in that role from 1959 to 2002 in Swansea and was the largest pilot cutter to actually go alongside vessels at sea. After decommissioning in 2002 she was transferred to Roath Basin in Cardiff, returning to Swansea in 2011.
SEAMARK has been abandoned at Swansea Marina since at least 2020.
In October 2025, Swansea Council issued a statement re: their historic vessel collection, including that there were plans to dispose of Seamark, which is not owned by them but has been abandoned and has deteriorated significantly, impacting the visual appeal and heritage value of the area.
In June 2026, SEAMARK was removed from the Helwick Pontoon at Swansea Marina and towed away to be disposed.
Although this vessel has been disposed, please let us know if you can update the vessel record with further information about its history.
Key dates
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1959
Built by P K Harris, Appledore
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1959
Commissioned by the Swansea Pilotage Authority
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1987
Ownership transferred to Associated British Ports
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2002
Decommissioned and transferred to Cardiff
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2011
Ownership transferred to the Pilot Cutter Seamark Charitable Trust
Own this vessel?
If you are the owner of this vessel and would like to provide more details or updated information, please contact info@nationalhistoricships.org.uk
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