Kwo Chau Wan at South Ninepin Island offers a diverse underwater landscape featuring reefs, caves, caverns, and drop-offs. Divers can explore these formations at depths between 7 and 15 metres. Conditions typically involve moderate currents and a visibility of 5 metres, requiring careful navigation. Due to the presence of sharp coral, rocks, and sea urchins, precise buoyancy control is essential. Boat access is required to reach this site, which is located 14 kilometres from shore. Divers must remain vigilant regarding boat traffic and are advised to deploy a surface marker buoy at all times to ensure visibility during the dive and ascent.

South Ninepin Island offers a shallow reef environment suitable for beginner divers. The site features a reef structure extending from the surface to a maximum depth of 12 metres. Access is exclusively by boat, and the area typically experiences mild currents. Visibility at this site can vary significantly, so divers should check local conditions before departure. Water temperatures fluctuate between 19 and 29 degrees Celsius throughout the year, requiring seasonal adjustments to exposure protection. Divers must remain vigilant regarding active boat traffic in the vicinity and avoid contact with the seabed to prevent injury from sharp rocks and coral.

Basalt Island, located near East Ninepin Island, features a reef environment suitable for beginners and snorkellers. The site ranges from the surface to a maximum depth of 13 metres. Divers frequently encounter Zebra Lionfish, Flamingo Tongue, and Clark's Anemonefish. Other species recorded here include Robust Ghost Pipefish, Chromodoris Nudibranch, Stonefish, Indian Lionfish, Scorpionfish, White-spotted Puffer, Flatworm, Pufferfish, Rock Cod, Starry Puffer, and various wrasses. Access is by boat only. Conditions, including visibility and current, are variable. Due to active boat traffic in the Sai Kung area, divers must deploy a surface marker buoy before ascent and remain aware of their surroundings.

Trio Island, located off South Ninepin Island, features a combination of natural reef and artificial reef structures. The site ranges in depth from 5 to 21 metres, with an average depth of 10 metres. Divers encounter mild currents, though conditions can vary, and visibility typically spans 5 to 15 metres. Access is strictly by boat, and the site is suitable for intermediate divers. Due to active boat traffic in the area, divers must deploy a surface marker buoy before ascending and remain vigilant during safety stops. The site is also suitable for night diving, with typical dives lasting around 45 minutes.

Clear Water Bay at Shelter Island in Hong Kong is a marine site featuring both natural and artificial reefs. Suitable for beginners, the site offers depths ranging from 3 to 8 metres. Divers can access the water via shore or boat. Conditions are variable, with visibility typically between 3 and 10 metres and mild currents. Hazards include boat traffic, potential entanglement, low visibility, sharp coral, and surf. On-site facilities include parking, toilets, showers, changing rooms, and a cafe. Water temperatures fluctuate throughout the year, ranging from 19C in January to 29C in September.

Little Palm Beach on Shelter Island provides a shallow reef environment ideal for beginner snorkellers. The site features depths ranging from 2 to 6 metres, with an average of 4 metres. Conditions are generally mild, though visibility fluctuates between 3 and 10 metres. Shore entry is straightforward, but users should remain cautious of boat traffic near the entry point, particularly on weekends. Toilets are available at the location. When entering the water, be mindful of sharp coral and potential hazards on the seabed. Maintain neutral buoyancy to avoid contact with the reef surface and stay aware of your surroundings throughout your session.

Shelter Island in Hong Kong offers a shallow reef environment suitable for beginners, with depths ranging from the surface down to 9 metres. The site is accessible only by boat, and the mild currents make it a manageable location for snorkelling. Water temperatures fluctuate between 19C and 29C throughout the year, requiring appropriate thermal protection during cooler months. Visibility is variable and depends heavily on local weather, tidal movements, and seasonal changes. Due to active boat traffic in the area, snorkellers must remain vigilant when surfacing and are advised to use a brightly coloured snorkel vest or tow float for visibility.

East Dam in Hong Kong is an artificial reef structure located 1000 metres from the shore. This site offers shallow, accessible diving with depths ranging from 3 to 10 metres, averaging 6 metres. It is well-suited for beginners due to the mild current and relaxed conditions. Visibility typically fluctuates between 3 and 8 metres, and divers should remain aware of boat traffic in the area. Water temperatures vary from 19C in January to 29C in September. Divers must access this site by boat and are advised to deploy a surface marker buoy before ascending to ensure safety.