Basse du Lys, located off the Crozon Peninsula, is a diverse site featuring a reef, wall, drop-off, cave, and artificial reef structures. Divers can explore depths ranging from 7 to 33 metres, with an average depth of 25 metres. The site is accessible only by boat and is suited for intermediate divers due to moderate currents and overhead environments within the caves. Visibility typically ranges between 5 and 8 metres, and water temperatures remain between 11 and 13 degrees Celsius year-round. Divers should use caution regarding entanglement risks in caves and time entries around slack water to manage the current.

Pointe de Penhir is located on the western tip of the Crozon Peninsula, France, featuring a combination of natural and artificial reef structures. Divers can explore depths ranging from 15 to 24 metres, with an average depth of 15 metres. Visibility at the site varies between 10 and 30 metres. Due to the presence of strong currents, rip currents, and hazardous surf at the shore, boat access is required for all dives. Conditions can change rapidly with the tide, making it essential to plan dives around slack water. Full exposure protection is necessary year-round as water temperatures remain between 11 and 13 degrees Celsius.

La Vandree is a deep-water site located off the Crozon Peninsula, requiring boat access to avoid dangerous surf and shore breaks. The site sits at depths between 40 and 48 metres, necessitating careful decompression planning and vigilance regarding nitrogen narcosis. Visibility ranges from 10 to 30 metres, providing clear views of the reef structure. Water temperatures remain consistently cold, between 10 and 12 degrees Celsius, making a drysuit essential. While currents are generally mild, they can shift, and divers must coordinate their descent with local tidal windows to ensure safety at this depth.

The Marco Polo II is a wreck dive located off the Crozon Peninsula, resting at depths between 28 and 30 metres. This site requires boat access and is suited for intermediate divers due to the depth and the presence of moderate currents. Visibility typically ranges from 5 to 10 metres, making a torch useful for inspecting the structure. Water temperatures remain between 11 and 14 degrees Celsius throughout the year, necessitating a drysuit or thick wetsuit. Divers should monitor conditions closely, as currents can strengthen quickly; timing dives around slack water is recommended. Ensure all air fills and equipment are prepared in Brest before departure.

The Swansea Vale is a wreck site located 4000 metres off the Crozon Peninsula, resting at depths between 28 and 31 metres. This intermediate-level dive requires boat access and is characterised by strong currents, making it essential to time descents around slack water. Visibility typically ranges from 5 to 10 metres. Divers should maintain strict buoyancy control and remain aware of potential entanglement hazards within the wreck structure. Due to the significant depth and current conditions, careful dive planning is necessary for this 41-minute average dive. Water temperatures remain cool throughout the year, ranging from 11C to 13C.

Marco Polo III is a reef site located off the Crozon Peninsula, accessible only by boat. The site sits at a depth of 27 to 30 metres, requiring divers to hold an appropriate certification for these depths. Conditions include a moderate current and visibility typically ranging between 5 and 10 metres. Water temperatures are cool, fluctuating between 11 and 13 degrees Celsius throughout the year, making a drysuit or thick wetsuit necessary for thermal protection. Divers should plan their profiles to work with the current and monitor air consumption closely due to the cold water environment.

The Marco Polo I is a wreck dive located in the Molène Archipelago, resting at a depth of 28 metres. This site is suitable for intermediate divers who are comfortable with deeper water and moderate currents. Visibility typically ranges between 5 and 10 metres, and water temperatures remain between 11 and 13 degrees Celsius throughout the year, necessitating appropriate thermal protection. Access is by boat only. Divers should be aware of potential entanglement hazards within the wreck structure and plan their bottom time carefully around slack water. A cutting tool and a torch are recommended for those exploring the wreck.

Baliseur is a challenging wreck and reef site in the Molène Archipelago, offering depths ranging from 5 to 45 metres. The site features a wreck structure combined with surrounding reef formations. Divers must be prepared for strong currents, which require precise timing relative to the tidal window. Visibility is consistently 30 metres. Due to the cold water temperatures of 10 to 12 degrees Celsius and the technical nature of the site, a drysuit is recommended. Access is strictly by boat, and the site is reserved for advanced divers with deep diving certifications. Divers should be aware of potential surf and sharp rock formations when planning their entry.