The Shinkoku Maru is a Japanese tanker sunk during Operation Hailstone in 1944, resting upright on the floor of Chuuk Lagoon. The wreck offers a wide range of depths, with the shallowest structure at 11 metres and the hull reaching 40 metres. Divers encounter mild currents and visibility ranging from 12 to 38 metres. The superstructure is colonised by coral and supports a diverse reef ecosystem. Due to the depth and potential for entanglement within the engine room and cargo holds, this site is suited for intermediate divers. A torch and reel are recommended for penetration, and divers should monitor bottom time carefully to manage nitrogen narcosis.

The Yamagiri Maru is a Japanese cargo vessel resting upright on the seabed of Chuuk Lagoon. This wreck dive reaches depths of 30 to 34 metres, with an average depth of 25 metres. Visibility typically ranges between 10 and 30 metres, allowing divers to view the vessel's silhouette as they descend. The site features mild currents and is accessible only by boat. Due to the depth and potential for entanglement within the cargo holds, this site is suited for intermediate divers. Night diving is available, offering a distinct perspective of the structure. Divers should remain cautious of boat traffic when surfacing and manage their bottom time carefully.

The Kensho Maru is a wreck dive located in Chuuk Lagoon, Micronesia. Resting at depths between 12 and 40 metres, the site offers varied topography suitable for intermediate divers. Visibility typically ranges from 10 to 30 metres, providing clear sightlines along the hull. The site features mild currents, though divers must manage overhead environments and potential entanglement hazards within the structure. Water temperatures remain consistent between 29 and 30 degrees Celsius throughout the year. Access to the site is by boat only. Divers should exercise caution regarding deep diving protocols and nitrogen narcosis risks, and carry torches for any interior penetration.

The Kiyosumi Maru is a shipwreck located in Chuuk Lagoon, Micronesia, resting at depths between 12 and 37 metres with an average depth of 25 metres. This wreck serves as an artificial reef, and species recorded around this area include bluefin trevally, horse eye jack, and various wrasses. Access is by boat only, and the site is suitable for intermediate divers. Visibility typically ranges from 10 to 30 metres, with mild currents and water temperatures between 29 and 30C. Divers should be aware of hazards including deep water, entanglement risks, overhead environments, and sharp coral. A torch is recommended for interior passages, and a surface marker buoy is essential due to boat traffic.

The Heian Maru is a large Japanese submarine tender resting in Chuuk Lagoon. This wreck lies at depths between 20 and 36 metres, with an average depth of 23 metres. Divers access the site by boat, where mild currents typically prevail. Visibility ranges from 10 to 30 metres, allowing for views of the hull structure. The site features penetration opportunities, though the overhead environment requires proper wreck training and a dive torch for dark interior passages. Due to the depth and wreck structure, this site is suited for intermediate divers with appropriate certification. Local operators provide guided tours, air fills, and equipment rental.

The Emily Flying Boat is a Japanese Kawanishi H8K aircraft resting upright on a sandy bottom in Chuuk Lagoon. Situated at a depth of 15 to 16 metres, the wreck is accessible to intermediate divers. Visibility typically ranges from 15 to 20 metres, allowing for clear views of the fuselage and gun turrets. The airframe is covered in coral growth. Divers should be aware of sharp coral and significant entanglement hazards near gun blisters and open hatches. Access to this site is by boat only, with mild currents generally present. Species recorded around this area include wrasses, blue dragon, and various damselfish.

The Betty Bomber is a wreck dive located in Chuuk Lagoon, Micronesia, resting at a depth of 17 to 18 metres. This site is accessible by boat and features mild currents, making it suitable for beginner divers. Visibility typically ranges from 10 to 30 metres, allowing for clear views of the aircraft structure. Water temperatures remain consistent between 29 and 30 degrees Celsius throughout the year. Divers should be aware of potential hazards, including entanglement risks within the airframe, sharp edges on the wreck, and the occasional presence of jellyfish. Full skin suits or light wetsuits are recommended for protection and thermal comfort during the typical 45-minute dive.

The Yubai Maru is a wreck dive located in Chuuk Lagoon, resting at depths between 15 and 36 metres with an average depth of 25 metres. Access is by boat only. The site features an overhead environment requiring wreck-diving awareness due to potential entanglement risks, sharp edges, and limited exit options. Visibility typically ranges from 10 to 30 metres, and mild currents are present. Divers should be aware of hazards including decompression, nitrogen narcosis, and boat traffic. Night diving is permitted at this site. Due to the depth and overhead nature of the wreck, it is suited for intermediate divers. Always confirm current conditions with a local operator before diving.