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HMS Colossus Dive Trail

  • History
    More about HMS Colossus
  • Post-wrecking history
    Wreck timeline since 1799
  • Start the Dive Trail
    View the dive stations
  • Dive trail plan
    2D plan of wreck & Dive Trail with video
  • 3D multibeam sonar survey
    View the sonar survey in 3D
  • Dive videos
    Go on a guided dive tour of the wreck
  • Dive slate
    PDF download to print
  • Two unusual lead objects
    19th century diving on Colossus
  • Deadeye and chains
    Deadeye complete with iron chains
  • The empty gun port
    How the wreck changes through time
  • Any old iron?
    Identifying parts of an anchor
  • News & contributions
    Latest updates & dive photos
  • Add your own photos & videos
    Contribute via social media & email
  • Glossary
    Technical terms explained
  • About
    More about this project
  • CISMAS
    This project was undertaken by CISMAS – Cornwall and Isles of Scilly Maritime Archaeology Society

Commissioned by

Historic England logo

December 2025 – Dive Trail Refurbishment

In 2025 the HMS Colossus dive trail was refurbished and updated. The “Start the Dive Trail” page has been changed to include updated descriptions for each dive station, along with a PDF which can be downloaded for printing.

View the full report of the Colossus 2025 Diver Trail Refurbishment (PDF, 7.9MB)

Posted on December 23, 2025December 23, 2025Author adminCategories News

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