Pulau Hantu Besar features a diverse underwater environment comprising reefs, seagrass beds, and artificial structures. Located 13 kilometres from the shore, this site offers depths ranging from 2 to 20 metres with an average of 10 metres. Divers encounter moderate currents and visibility that fluctuates between 1 and 10 metres. The site is suitable for beginners and supports night diving. Access is strictly by boat, with facilities including air fills, showers, and toilets available. Hazards to note include boat traffic, entanglement risks, strong currents, and low visibility. Water temperatures remain consistent throughout the year, typically between 27C and 30C.

Hantu Wreck, located off Pulau Hantu Besar, is a combined reef and artificial reef site suitable for beginners. The site reaches depths between 7 and 23 metres, with an average depth of 10 metres. Divers and snorkellers can access the site by boat or from the shore, though it is located 9000 metres from the mainland. Conditions vary, with visibility ranging from 1 to 10 metres and mild currents. Marine life recorded here includes the Blue Dragon, Slender Ceratosoma Nudibranch, Black-margined Nudibranch, and various flatworms. Rarer sightings include the Spiny Tiger Shrimp, Bluespotted Fantail Ray, and Harlequin Sweetlips. Be aware of boat traffic and sharp coral when diving.

Raffles Lighthouse Jetty is a marine site in the Southern Islands of Singapore featuring a combination of natural reef and artificial structures. Divers can explore depths ranging from 5 to 18 metres, with an average depth of 12 metres. The site is accessible by boat only and is suitable for beginners, though conditions can vary. Visibility typically ranges between 5 and 15 metres, and water temperatures remain warm between 27 and 30C. Divers should be aware of potential hazards including entanglement, jellyfish, and stonefish. Due to variable visibility and shifting currents, maintaining close contact with your team and monitoring your depth is essential throughout the 40-minute dive.