HMSM P555 - Cornwall & Devon

The HMSM P555 is a proper dive, a deep shot that really makes you feel like you’re exploring. We love how intact she is for a wreck of her age. Dropping down to 40 metres, you first make out the conning tower, then the full 66 metres of her length stretches out, surprisingly complete. You can still see the torpedo tubes at the bow and stern, and the gun mount forward of the conning tower. It’s a dark dive, as you’d expect at this depth in British waters, but the visibility here can be surprisingly good on a calm day, giving the whole submarine a ghostly silhouette. Life around the P555 is prolific. The wreck acts as a huge artificial reef. Conger eels are a common sight, peering out from open hatches and crevices. We’ve spotted massive ballan wrasse patrolling her decks, and ling often lurk in the deeper sections. It’s a site for experienced divers, no doubt about it, with the depth and potential for currents. Our favourite way to dive her is on a slack tide, giving you plenty of time to explore the exterior, tracing her length from bow to stern and imagining her operational days. It’s a deep, contemplative dive that rewards patience and a good eye for detail.

Location
Cornwall & Devon, United Kingdom, Mediterranean & Europe
Coordinates
50.515232, -2.557783
Type
wreck
Maximum Depth
40m

Marine Protected Area: South of Portland

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 HMSM P555

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 HMSM P555

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 typical depth range for diving the HMSM P555 wreck?
The HMSM P555 wreck is typically found at a depth of 40m. This depth makes it an exciting dive for those with appropriate training and experience in deeper waters.
What kind of marine life and wreck features can divers expect to see on the HMSM P555?
The HMSM P555 is a fascinating submarine wreck, measuring 66.8m x 6.4m. Divers can explore its features, including a 4 inch gun and 4 torpedo tubes, remnants of its past as the EX-UNITED STATES SUBMARINE S 24. While specific marine life isn't detailed, wrecks often become artificial reefs, attracting various marine species over time.
How challenging is the HMSM P555 as a dive site, considering its location and structure?
The HMSM P555 is classified as an intermediate difficulty dive site. As a non-dangerous wreck, it offers an engaging experience for divers with suitable training. Its structure as a submarine vessel provides interesting exploration opportunities.
When is the optimal time to dive the HMSM P555 to experience the best conditions?
The provided data does not specify an optimal time to dive the HMSM P555 for best conditions. We recommend checking local dive reports and forecasts for Cornwall & Devon to determine the best visibility and current conditions before planning your dive. For general guidance on dive planning, visit our When to Dive section.
What dive certifications are recommended or required to safely dive the HMSM P555?
Given the HMSM P555's depth of 40m and intermediate difficulty, certifications such as Advanced Open Water Diver or Deep Diver are highly recommended. These certifications ensure divers have the necessary skills and experience for safe deep wreck diving. Always dive within your training and comfort limits.
What are the typical current conditions and visibility like at the HMSM P555 dive site?
The provided data does not include specific information on typical current conditions or visibility at the HMSM P555 dive site. Divers should consult local dive operators or recent dive reports for Cornwall & Devon to get the most up-to-date information on these factors. Always be prepared for varying conditions when diving wrecks.