Lochaline provides diverse underwater topography including wrecks, walls, and reefs accessible via a single shore entry. The site spans a significant depth range from 1 to 90 metres, with an average depth of 20 metres. Visibility typically fluctuates between 3 and 15 metres. Divers should be prepared for moderate currents, which can strengthen, alongside potential down currents and boat traffic. Due to water temperatures ranging from 8 to 14 degrees Celsius, a drysuit is recommended. An on-site dive shop provides air fills and guided tours, which are advised for managing the site's specific current patterns and depth profiles.

Lochaline Pier provides access to a diverse underwater environment featuring vertical walls, reefs, kelp forests, and wrecks within the Sound of Mull. The site is characterised by a dramatic drop-off, with depths ranging from 1 to 90 metres. Due to strong currents, boat traffic, and cold water temperatures between 8C and 14C, this site is suited for advanced divers. Snorkellers can explore the shallower sections near the old pier. Divers should be aware of hazards including low visibility, entanglement risks, and down currents. Facilities at the site include parking, air fills, a dive shop, boat charters, guided tours, a cafe, and gear storage.

The SS Rondo is a challenging wreck dive located in the Sound of Mull, United Kingdom. The vessel lies at depths ranging from 4 to 50 metres, with an average depth of 30 metres. Due to the significant depth and strong currents, this site is strictly for advanced divers. Boat access is required, and dives must be timed precisely with slack water windows. Visibility varies between 10 and 30 metres. Given the water temperatures of 8 to 14 degrees Celsius, a drysuit is essential. Divers should be prepared for decompression requirements and potential entanglement risks within the wreck structure. Always carry a delayed surface marker buoy for ascent.

The Shuna Wreck is a notable wreck site located in the Sound of Mull, resting at depths between 16 and 32 metres with an average depth of 18 metres. This site is suitable for intermediate divers with wreck certification. Access is strictly by boat, and divers should be prepared for surge and swell conditions during entry. Visibility typically ranges from 10 to 30 metres, though divers must remain cautious of sharp edges and entanglement risks throughout the structure. Due to local boat traffic, the use of a surface marker buoy is essential. The site experiences mild currents, though water movement can change during the dive.

Ganavan Sands in Oban offers an accessible shore entry via a concrete ramp, leading into a bay characterised by a mix of sandy bottom, rocky outcrops, and seagrass beds. This site is suitable for beginners, with depths ranging from 1 to 8 metres and an average depth of 4 metres. Snorkellers can explore the kelp forest and seagrass habitats, which support a variety of regional marine life and invertebrates. Conditions are variable with mild currents and visibility typically between 5 and 10 metres. Water temperatures are cold, ranging from 4°C to 14°C. Hazards include boat traffic, cold water, entanglement, jellyfish, and low visibility.

Heather Island offers a diverse underwater experience within the Sound of Mull, featuring a wall, a cave system, and a wreck in one location. Suitable for beginner divers, the site provides a variety of topography without significant currents. Depths range from 15 to 30 metres, with an average of 20 metres. Visibility typically varies between 5 and 10 metres. Due to water temperatures ranging from 8 to 14 degrees Celsius, a drysuit or a minimum 7mm wetsuit with hood and gloves is strongly recommended. Boat access is required for this site, and local facilities provide air fills, equipment rental, and boat charters.

SAMS Beach is a horseshoe bay located in the Sound of Mull, sheltered by rock formations. This site offers shore access for snorkelers, with depths ranging from 2 to 15 metres and an average depth of 7 metres. The underwater topography consists of reefs and kelp forests. Conditions are generally mild, making this a suitable location for beginners. Facilities available at the site include parking, a cafe, and showers. The site is situated next to the Scottish Association for Marine Science.

Gallanach Reef is a granite rock formation rising from a depth of 9 metres to 1.5 metres below the surface. This site features a wall and reef topography suitable for beginner divers and navigation practice. Located within the Sound of Mull, the area offers sheltered waters, though divers should remain aware of boat traffic and potential current. Shore access is available, with high tides providing the easiest entry and improved visibility. The average depth is 10 metres, with a typical dive duration of 40 minutes. Facilities including parking, toilets, and air fills are available nearby.