PLM 4 (POSSIBLY)
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) - PLM 4 (POSSIBLY) offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.
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.
Typical PLM 4 (POSSIBLY) 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 49m 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 PLM 4 (POSSIBLY)
Conditions
Ocean conditions, forecast and tides for PLM 4 (POSSIBLY)
PLM 4 (POSSIBLY) Ocean Conditions
Monthly averages for PLM 4 (POSSIBLY), 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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