Wreck of shipwreck possibly the Mercator
Protected Area
Bullers of Buchan Coast
Why dive here
With 140+ marine species recorded in the area - including blue whales, dolphins, dwarf minke whales, humpback whales and ocean sunfish (mola mola) - Wreck of shipwreck possibly the Mercator offers some of Scapa Flow, Orkney's richest wreck diving. Water ranges 8-14°C, warmest July, August, September.
Diving Scapa Flow, you’re always chasing history. The U-18 (Probably) is one of our favourites for that exact reason – it’s a tangible piece of two World Wars, even if its identity is still debated. Dropping onto the wreck, usually around 25-30 metres, you're greeted by a remarkably intact hull, considering its age. The conning tower is still distinct, making for a great navigation point and a superb photo opportunity. This isn't a brightly lit, colourful coral dive. Instead, it’s a dive into a muted, often green world, where the steel structure is draped in dead man’s fingers and anemones. We love the resident wolf-fish here; they're usually tucked into crevices, giving you that perfect, slightly menacing stare. Look out for huge Atlantic cod cruising by, too. The dive itself is usually quite relaxed, making it a good entry point for those new to Scapa’s deeper wrecks, but visibility can be fickle. Pick a calm day, ideally after a few days of settled weather, for the best chance of a clear view of this fascinating wreck.
Typical Wreck of shipwreck possibly the Mercator Dive Profile
Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.
Safety Notes
Depth of 20m - Advanced Open Water certification recommended.
Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.
Cold water this month (avg 13°C). Drysuit or thick wetsuit (7mm+) recommended.
Always perform a 3-minute safety stop at 5m before surfacing.
Reviews for Wreck of shipwreck possibly the Mercator
Conditions
Ocean conditions, forecast and tides for Wreck of shipwreck possibly the Mercator
Wreck of shipwreck possibly the Mercator Ocean Conditions
Monthly averages for Wreck of shipwreck possibly the Mercator, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (58.64, -3.16) (8km away)
October Averages
Sea Temperature
13°C
55°F · Range: 11.4–13.8°C
Air Temperature
10°C
50°F
Wind Speed
9.26 m/s
18.0 knots
Atmospheric Pressure
1005.3 hPa
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data
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