PLM 4 (POSSIBLY) - Cornwall & Devon

The PLM 4 is a proper historical dive, one we really enjoy. She’s a steamship, sunk by a German U-boat in 1917, and sits at 49 metres. Getting down there, you’ll often find the vis isn't what you’d call tropical, but that just adds to the atmosphere. We've spent many a dive finning over her decks, imagining the chaos of her final moments. The wreck itself is surprisingly intact for its age and location, offering some great penetration opportunities if you’re properly trained and equipped. Look out for conger eels peering from every dark recess; they’re practically residents. We’ve also seen some impressive pollack schooling above the main structure, and the occasional lobster tucked away in a crevice. It’s a dive for those who appreciate history and don't mind a bit of a challenge, a proper deep wreck experience for experienced divers.

Location
Cornwall & Devon, United Kingdom, Mediterranean & Europe
Coordinates
50.141018, -0.834650
Type
wreck
Maximum Depth
49m

Marine Protected Area: Dolphin Head Highly Protected Marine Area

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 PLM 4 (POSSIBLY)

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 PLM 4 (POSSIBLY)

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 at PLM 4 (POSSIBLY) and what kind of underwater topography can be expected?
The PLM 4 (POSSIBLY) wreck is found at a depth of 49m. Divers can explore the remains of this 77.1m x 13.4m steam ship, which was torpedoed in 1917. This offers a fascinating wreck diving experience, classified as a non-dangerous wreck, providing an intriguing historical topography to explore.
What specific marine life and coral formations are commonly seen at PLM 4 (POSSIBLY), especially for macro enthusiasts?
Based on the provided data, specific details regarding marine life or coral formations at the PLM 4 (POSSIBLY) wreck are not available. However, wrecks in the Cornwall & Devon area often become artificial reefs, attracting various temperate marine species. For more general information on marine life, you might visit our wildlife database.
How challenging is the diving at PLM 4 (POSSIBLY), and is it suitable for beginner or advanced divers?
Diving at PLM 4 (POSSIBLY) is classified as intermediate difficulty. With a depth of 49m, this site is best suited for divers with experience beyond entry-level certifications. Advanced divers will find the challenge and depth rewarding for exploring this historic wreck.
What is the best time of year to dive PLM 4 (POSSIBLY) for optimal visibility and marine activity?
The provided data does not specify the best time of year for optimal visibility or marine activity at PLM 4 (POSSIBLY). General conditions for diving in the United Kingdom can vary significantly with seasons. For more general guidance on when to dive, please consult our When to Dive section.
Are there any specific diving certifications required or highly recommended to dive at PLM 4 (POSSIBLY)?
Given the intermediate difficulty and depth of 49m at PLM 4 (POSSIBLY), certifications beyond Open Water Diver are highly recommended. Divers should ideally hold advanced certifications such as Advanced Open Water or Deep Diver specialties to safely and comfortably explore this site. Always ensure your training and experience match the dive conditions.
What are the typical current conditions and water visibility at PLM 4 (POSSIBLY)?
The provided data for PLM 4 (POSSIBLY) does not include specific information on typical current conditions or water visibility. These factors can vary greatly depending on local weather and tidal patterns in Cornwall & Devon. It is always advisable to check local dive reports before planning your dive.