HMS SAPPER - Cornwall & Devon

The HMS Sapper, a former trawler turned WWI minesweeper, sits upright at 29 metres, making her a genuinely compelling dive off the Cornish coast. We love wrecks with a bit of history, and this one certainly delivers – sunk by a mine in 1917, she’s a tangible piece of naval past. Dropping down, you'll feel the colder water, but it's worth it for the visibility, which can push past 15 metres on a good day. The wreck itself is remarkably intact. Her bow points east, and you can still pick out the triple expansion engine, a real highlight for us. The single boiler is also quite prominent, providing a great reference point. Schools of pollack dart through the structure, and the occasional conger eel peeks out from beneath plating. Our favourite part? The way the light filters through the broken deck beams, illuminating patches of jewel anemones that have colonised the metalwork. This dive suits those comfortable with deeper wrecks and temperate water conditions. The strong tides here mean slack water is crucial for an enjoyable dive, so plan your descent carefully. It’s not about huge pelagics, but about the atmosphere and the details of a century-old war grave.

Location
Cornwall & Devon, United Kingdom, Mediterranean & Europe
Coordinates
50.622000, -0.687283
Type
wreck
Maximum Depth
29m

Marine Protected Area: Offshore Overfalls

Best Time to Dive in Cornwall & Devon

The warmest water temperatures in Cornwall & Devon occur in January, averaging 9.6°C. The coolest conditions are in December at 9.6°C.

Monthly Water Temperatures

  • January: 9.6°C (air: 7.3°C)
  • February: 9.6°C (air: 8.4°C)
  • March: 9.6°C (air: 8.6°C)
  • April: 9.6°C (air: 10.1°C)
  • May: 9.6°C (air: 12.6°C)
  • June: 9.6°C (air: 15.2°C)
  • July: 9.6°C (air: 16.6°C)
  • August: 9.6°C (air: 17.1°C)
  • September: 9.6°C (air: 15.9°C)
  • October: 9.6°C (air: 13.5°C)
  • November: 9.6°C (air: 10.7°C)
  • December: 9.6°C (air: 8.7°C)

Nearby Dive Sites in Cornwall & Devon

Nearest Dive Centres to HMS SAPPER

Marine Life in Cornwall & Devon

Home to 192 recorded species including 93 reef fish, 18 sharks & rays, 13 whales & dolphins, 11 crabs & lobsters, 11 other, 10 seagrass & algae.

Notable Species

Recommended Packing List for HMS SAPPER

Based on average water temperature of 9.6°C.

  • Drysuit - water at 10°C demands a drysuit with thermal undergarments
  • Hood & Gloves (7mm+) - critical to prevent heat loss
  • Mask - essential for every dive
  • Fins
  • BCD - buoyancy compensator
  • Regulator - your most safety-critical piece of gear
  • Dive Computer - tracks depth, time, and NDL
  • Surface Marker Buoy (SMB) - essential for boat pickups
  • Dive Torch - useful for crevices and colour at depth
  • Underwater Camera - capture your diving memories

Frequently Asked Questions

What is the maximum depth of the HMS Sapper dive site?
The maximum depth of the HMS Sapper dive site is 29 meters. This makes it a moderately deep dive, suitable for divers with appropriate training and experience.
What kind of marine life and wreck features can divers expect to see on the HMS Sapper?
The HMS Sapper is a 39.6m x 4.1m trawler vessel, built in 1915 and sunk in 1917. Divers can expect to explore its wreck features, including a boiler, triple expansion engine, and single shaft. While specific marine life is not detailed in the provided data, wrecks often become artificial reefs, attracting various species over time.
How challenging is the HMS Sapper wreck dive, and is it suitable for advanced open water divers?
The HMS Sapper wreck dive is classified as intermediate difficulty and is also noted as a dangerous wreck. While it might be suitable for experienced advanced open water divers, its dangerous classification suggests that additional training or experience beyond basic advanced open water certification may be beneficial, especially for wreck penetration or challenging conditions. Divers should ensure they have the necessary skills and comfort level for such a site.
What is the best time of year to dive the HMS Sapper for optimal visibility and conditions?
The provided data does not specify the best time of year to dive the HMS Sapper for optimal visibility and conditions. For general guidance on diving seasons in the United Kingdom, you may consult our When to Dive section for broader regional information.
What scuba diving certifications are required to dive the HMS Sapper wreck?
Given the HMS Sapper's maximum depth of 29 meters and its intermediate difficulty rating, divers should ideally hold at least an Advanced Open Water certification or equivalent. This level of certification ensures divers are trained for depths up to 30 meters and have experience with more challenging dive environments.
What are the typical current conditions and visibility like at the HMS Sapper dive site?
The provided data does not include specific information regarding the typical current conditions or visibility at the HMS Sapper dive site. Divers planning to visit this Cornwall & Devon wreck should consult local dive operators for up-to-date reports on conditions.