RNLB Thomas McCunn (ON 759) is a 45ft 6in Watson-class[1] lifeboat stationed at Longhope in Orkney, Scotland,[2] from January 1933 until April 1962.

[1] After Thomas McCunn left Longhope she was placed into the reserve fleet for ten years before being sold and used as a pleasure boat.

[1] Thomas McCunn was built at the yard of Groves and Guttridge Ltd on the Isle of Wight, England.

[1] Her hull is constructed using double diagonal planking of Honduras Mahogany on a framework of Teak ribs and beams with the stem and stern posts and her keel of English oak.

The stern and stem posts are grown to the required shape to give the lifeboat its strength and sturdiness.