HMSM H 52
Protected Area
Rame Head
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) - HMSM H 52 offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.
The H 52 isn’t just another bit of metal on the seabed. This wreck, a B-class submarine, went down in 1928, torpedoed for a film called ‘Q Ships’. We love that story, it gives the dive a quirky historical twist. Lying at 56 metres, the boat’s still largely intact, a real hulk emerging from the gloom. You can make out the conning tower, the torpedo tubes, even the periscope shears. It’s an advanced dive, for sure, with the depth and often stiff currents, but the rewards are there. On a good day, with visibility stretching to 10 metres, the sheer scale of the H 52 is impressive. Shoals of bib dart in and out of the broken plating, while plump conger eels peer from every dark crevice. Our favourite detail is the way the soft corals have started to colonise the decks, a vibrant splash of orange and pink against the grey steel. It’s a dive for wreck enthusiasts who appreciate history and aren’t afraid of a bit of depth and cold water. Look for slack water if you want to explore the exterior properly; otherwise, it’s a fast drift over a fascinating piece of cinema history.
Typical HMSM H 52 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 56m 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.
Nearest Dive Centres to HMSM H 52
Dive shops near HMSM H 52
Dive Looe
Plymouth Diving Centre
Sound Diving Limited
Viewpoint Diving Centre
Scuba 2000
Karleyth Diving Ltd.
Reviews for HMSM H 52
Conditions
Ocean conditions, forecast and tides for HMSM H 52
HMSM H 52 Ocean Conditions
Monthly averages for HMSM H 52, 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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