187 grt; 22t bollard pull
Operator: London Tugs Ltd, Gravesend, Kent, UK
Built 1960 by Henry Scarr Ltd, Hessle, Yorkshire, UK
Main engine: six-cylinder, two-stroke British Polar MN16 of 1,250 bhp at 250 rpm. Speed: 10 knots
Built for Ship Towage (London) Ltd; 1969-to London Tugs Ltd by amalgamation with W H J Alexander Ltd (Sun Tugs); 1975-by takeover to Alexandra Towing Co (London) Ltd; 1987-to Falmouth Towage Ltd, as ST MAWES; 2005-to Rachel Swain, Bideford, Devon and renamed IONIA. Laid up Bideford, still there.