Vobster Quay (Inland Training Hub)

Overview: The UK’s Premier Inland Training Center

Located in Somerset, England, Vobster Quay is the UK’s most popular inland freshwater dive site, featuring purpose-sunk aircraft, vehicles, and training platforms in depths ranging from 6m to 36m.

With clean freshwater, dedicated heated changing rooms, gas blending facilities (Air/Nitrox/Trimix), and zero tides, it is the primary training hub for UK Open Water and Technical diving courses.

Key Underwater Attractions

• The Hawker Siddeley 748 Aircraft (15m): A complete passenger aircraft split into sections for diver swim-throughs.
• The Tunnel & Submarine (12m–20m): Underwater road tunnels, commercial crushing works, and the ‘Subtech’ mini-submarine.
• The Deep Base (36m): Deep quarry walls used for technical and deep trimix training.

Logistics & Thermal Gear

• Water Temp: 6°C (Winter) to 18°C (Late Summer).
• Suit: 7mm semi-dry in summer; drysuit with thermal undergarments recommended year-round.
• Certification: All levels from Open Water (6m–18m) to Advanced (30m) and Normoxic Trimix (36m).

Technical Dive Profile & Navigation

1. Entry & Descent Mechanics

• Descent Method: Careful shore walk-in over reef platform or steps, kicking out to the descent buoy before dropping to prevent surface drift.
• Ear Equalization: Equalize continuously every 1 metre during the descent phase to prevent sinus or middle-ear barotrauma.
• Compass Heading & Navigation: Set a primary heading toward the main reef structure. Maintain buddy contact within 2 metres throughout the descent.

2. Deep Section & Gas Management (14m to 36m)

• NDL Discipline: At depths of 30m, your No-Decompression Limit ticks down rapidly. Monitor your dive computer continuously.
• The Craig Rule: Divers certified to Open Water level (18m maximum) must stay on the upper reef shelf and never follow advanced divers down past 18m.
• Turnaround Gas: Signal your buddy and start your ascent when the first diver reaches 110 bar (or one-third of usable cylinder capacity).

3. Ascent & 5m Safety Stop

• Ascent Rate: Ascend along the reef wall at a controlled rate not exceeding 9 metres per minute.
• Mandatory Safety Stop: Complete a strict 3-to-5-minute safety stop at 5 metres (15 feet) before deploying an SMB and surfacing with a 360-degree overhead scan.

Marine Life & Habitat Zones (Biologically Verified)

• Apex & Pelagic Predators: Atlantic Grey Seals (Halichoerus grypus), Basking Sharks (Cetorhinus maximus), Spiny Dogfish (Squalus acanthias).
• Reef Fish & Keystone Species: Conger Eels (Conger conger), Atlantic Wolffish (Anarhichas lupus), Ballan Wrasse (Labrus bergylta).
• Macro Biodiversity & Benthic Invertebrates: Tompot Blennies (Parablennius gattorugine), Yarrells Blennies, Nudibranchs (Coryphella lineata), Spiny Seahorses (Hippocampus guttulatus).
• Elasmobranchs & Marine Reptiles: Dead Mans Fingers (Alcyonium digitatum), Plumose Anemones (Metridium senile), Edible Crabs (Cancer pagurus), European Lobsters (Homarus gammarus).