AILSA CRAIG (PROBABLY) - Cornwall & Devon

Alright, let’s talk about the *Ailsa Craig*. Or, as we usually call it, the *Ailsa Craig (Probably)*. Because that's the thing with these older wrecks in UK waters, sometimes the history is a little... murky. But who cares about the name when the diving is this good? We love this wreck for its sheer presence on the seabed. She sits upright, pretty much intact, resting at 33 metres. You’ll drop down and feel that structure emerge from the gloom, usually with that classic Cornish green tint. The *Ailsa Craig* is a proper steamship, torpedoed back in 1918. You can still make out the bow, which is often our favourite place to start. Swim along the deck, and you’ll see where the bridge once was. The hold is open, inviting you in, but check your experience and conditions first. The stern is also a highlight, with the rudder and propeller still in place, usually hosting some decent conger eels. Visibility can swing dramatically here, so pick a calm day with neap tides if you can. It’s a site that rewards multiple visits, revealing more of its secrets each time. You'll find plenty of bib and pollack darting through the superstructure, and the encrusting life is quite something – dead man's fingers and anemones in abundance. This is a dive for those who appreciate history and don't mind a bit of a current occasionally.

Location
Cornwall & Devon, United Kingdom, Mediterranean & Europe
Coordinates
50.561400, -2.791783
Type
wreck
Maximum Depth
33m

Wreck History - AILSA CRAIG (PROBABLY)

Year Sunk
1918
Vessel Type
cargo ship
Cause
torpedo
Tonnage
608 GRT

The SS Ailsa Craig was a typical British coastal steamship built in 1906. A workhorse of her time, she spent her career transporting cargo around the British Isles, playing a vital role in the maritime commerce that was the lifeblood of the nation. Her service coincided with the First World War, a period of immense danger for merchant shipping due to Germany's campaign of unrestricted submarine warfare.

On April 15, 1918, during the final year of the war, the Ailsa Craig's luck ran out. While on a passage from Cardiff, she was targeted by the German U-boat UB-80 in the English Channel. A single torpedo strike was enough to sink the small steamer, sending her to the seabed and adding her name to the long list of merchant vessels lost during the conflict.

The wreck believed to be the Ailsa Craig now lies at a depth of 33 meters off the coast of Cornwall. For divers, it offers a poignant connection to WWI maritime history. While over a century on the seabed has taken its toll, the wreck's structure is still evident and provides a fantastic habitat for the region's diverse marine life, transforming a casualty of war into a thriving underwater ecosystem.

Marine Protected Area: West Dorset

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 AILSA CRAIG (PROBABLY)

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 AILSA CRAIG (PROBABLY)

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