WHALE UNIT 552
Protected Area
Dolphin Head Highly Protected Marine Area
Why dive here
With 176+ marine species recorded in the area - including blue sharks, dolphins, dwarf minke whales, humpback whales and ocean sunfish (mola mola) - WHALE UNIT 552 offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.
Diving a factory ship at 51 metres always feels a bit like stepping into a cold, wet time capsule, and Whale Unit 552 off Cornwall is no exception. We love this wreck for its sheer scale, a proper deep dive that rewards careful planning and good bottom time management. You’re dropping onto a massive industrial hulk, still largely intact, with enormous holds and machinery that tell a story of its working life before it found its final resting place. The visibility here can be decent on a good day, but it’s always dark at depth, so good lights are essential to really pick out the detail. We’ve found big conger eels tucked into the darker recesses, and the wreck structure itself is covered in dead man's fingers and anemones, which add a surprising splash of colour to the gloom. Our favourite part has to be exploring the open deck areas, imagining the whale processing that once took place here. This is a wreck for experienced divers comfortable with deeper profiles and the often chilly, current-swept conditions of the English Channel. Definitely one to factor in for a multi-day trip when the weather window looks promising.
Typical WHALE UNIT 552 Dive Profile
Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.
Safety Notes
Maximum depth 51m exceeds recreational limits (40m). Technical diving certification and equipment required.
Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.
Always perform a 3-minute safety stop at 5m before surfacing.
Reviews for WHALE UNIT 552
Conditions
Ocean conditions, forecast and tides for WHALE UNIT 552
WHALE UNIT 552 Ocean Conditions
Monthly averages for WHALE UNIT 552, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (50.44, -2.73) (3km away)
October Averages
Sea Temperature
17°C
62°F · Range: 15.1–17.5°C
Air Temperature
13°C
56°F
Wind Speed
8.14 m/s
15.8 knots
Atmospheric Pressure
1011 hPa
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data
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