The Lagoon at Koh Bida Nok features a diverse underwater topography including a reef, wall, and drop-off, complemented by caverns, swim-throughs, and a pinnacle. This site is accessible by boat and is suitable for beginners, with depths ranging from 1 to 35 metres and an average depth of 10 metres. Divers encounter mild currents and visibility that varies between 5 and 40 metres. The site supports night diving and offers a 50-minute typical dive duration. Hazards to note include boat traffic, deep sections, overhead environments, strong currents, and potential encounters with jellyfish, lionfish, stonefish, and sharks, as well as sharp coral.

Koh Haa #3 is a diverse site featuring a reef, wall, and cave system. The reef extends from shallow water to a depth of 30 metres, with an average depth of 15 metres. The site is accessible only by boat and is suited for intermediate divers due to the overhead environment within the cave. Visibility ranges from 5 to 30 metres, and mild currents are typical. Water temperatures generally remain between 28 and 31C, though thermoclines can cause localized drops in temperature and visibility. Divers should maintain careful buoyancy control to avoid contact with sharp coral and cave walls.

The Cathedral at Hin Daeng and Hin Muang is a complex site featuring a pinnacle, wall, and cavern system. Divers navigate depths ranging from 7 to 36 metres, with an average depth of 20 metres. Access is strictly by boat, as the site is located 20 kilometres from shore. Conditions include mild currents, though surge and strong currents can occur. The visibility fluctuates significantly between 5 and 40 metres. Due to the overhead environment and depth, this site is suited for intermediate divers. Hazards include the deep nature of the site, potential overhead environments, surge, and strong currents.

Koh Haa is a diverse marine site near Koh Lanta, Thailand, featuring a complex topography of reefs, walls, caverns, and drop-offs. Divers and snorkellers can explore depths ranging from 1 to 45 metres, with an average depth of 15 metres. Access is strictly by boat, as the site is located 20 kilometres from shore. Conditions generally feature mild currents and visibility between 15 and 30 metres. A thermocline may occur at greater depths, leading to temperature drops and reduced visibility. Hazards include boat traffic, overhead environments within the caverns, and sharp coral. Species recorded around this area include wrasses, Titan Triggerfish, Giant Moray, and Indian Lionfish.

Hin Muang is a remote offshore pinnacle in the Andaman Sea, featuring a dramatic wall that drops from 8 metres at the summit to 70 metres at its base. This site is suited for advanced divers due to strong, unpredictable currents and significant depths. Visibility typically ranges between 10 and 30 metres. Access is strictly by boat, and divers must be prepared for drift diving conditions. Due to the open-water location and potential for rapid current shifts, the use of a surface marker buoy and dive computer is essential for all divers. Water temperatures generally range from 28 to 31C, though thermoclines may create cooler layers at depth.

Koh Bida Nok is a marine site featuring a combination of reef, wall, and cave topography. Located 56 kilometres from shore, the site requires boat access. Divers and snorkellers can explore depths ranging from 5 to 30 metres, with an average depth of 15 metres. Conditions are generally characterised by mild currents and visibility between 10 and 25 metres. Water temperatures remain consistent throughout the year, typically between 29 and 31 degrees Celsius. The site is suited for intermediate-level divers. Hazards at this location include boat traffic, deep sections, overhead environments, and sharp coral. Guided tours and boat charters are available for those visiting the area.

Ko Ha 1 is a marine dive site located near Koh Bida Nok, Thailand, offering a diverse topography of reefs, caverns, and walls. Divers can explore depths ranging from 5 to 30 metres, with an average depth of 22 metres. Access to the site is by boat, as it is situated 20 kilometres from the shore. Conditions are generally mild, though visibility can fluctuate between 10 and 30 metres. Thermoclines may occur, which can lead to sudden temperature drops and reduced visibility. The site is suitable for beginners and supports night diving, with typical dive durations of 60 minutes. Divers should be aware of the presence of jellyfish.

Koh Haa offers diverse underwater topography, featuring a combination of reefs, walls, pinnacles, caverns, and wrecks. This site is suitable for intermediate divers, with depths ranging from 5 to 60 metres and an average depth of 20 metres. Visibility varies between 10 and 40 metres, and water temperatures remain consistent between 29 and 31 degrees Celsius. Access is by boat only, located 30 kilometres from shore. Divers should be prepared for moderate currents that can shift quickly. Due to the depth range and potential for strong currents, careful monitoring of air and bottom time is essential. Protective clothing is recommended to mitigate the risk of jellyfish stings.