Shinkoku Maru - Chuuk (Truk) Lagoon

30m Max

15-35m Vis

boat

Site Overview

Shinkoku Maru is one of the most celebrated dive sites in Chuuk (Truk) Lagoon, a 150 m oil tanker in 15 to 30 m of water, draped in coral and home to batfish and huge sea fans. The site is defined by a 150 m oil tanker with an enormous coral-encrusted superstructure, a penetrable bridge and engine room, and huge sea fans scattered across the hull, creating an underwater landscape that rewards divers with every visit. Resident batfish, moray eels and thousands of anthias swarm the structure, with lionfish, groupers and dense soft corals adding colour to every surface. Water clarity in this part of the Federated States of Micronesia is frequently excellent, with visibility often extending well beyond 15 metres and a comfortably warm tropical temperature year-round. The combination of healthy hard and soft corals, nutrient-rich currents and sheltered reef systems makes Shinkoku Maru a reliable location for both macro photography and wide-angle encounters. Local dive operators run regular trips to the site from nearby bases, and the geography means conditions are suitable across a range of experience levels with appropriate guidance. Conservation is taken seriously throughout Micronesia, and Shinkoku Maru benefits from marine protection that keeps fish stocks high and coral coverage dense. Divers who plan their visit around the calm season will find the most predictable conditions, though the site can be enjoyed throughout the year. Shinkoku Maru deserves a place on any serious Pacific diving itinerary, offering a genuine taste of the untouched beauty that makes Micronesia diving so highly regarded internationally. Regular visitors note that the marine life here, including batfish, moray eel, anthias, sea fan, lionfish, groupers, makes every descent memorable.

Dive Briefing

"The dive at Shinkoku Maru begins with a controlled entry and a short transfer from the nearest base, with the guide giving a full briefing on the site layout, expected marine life and emergency procedures. Descending toward a 150 m oil tanker with an enormous coral-encrusted superstructure, a penetrable bridge and engine room, and huge sea fans scattered across the hull, divers are immediately surrounded by batfish, moray eel, anthias, sea fan, with the reef revealing more detail the closer you look. The maximum depth reaches about 30 metres, while the average depth sits near 22 metres, so gas planning and a dive computer keep the profile safe and comfortable. Currents are described as mild, and the guide chooses the entry time to make the most of slack or mild flow, using a reef hook or DSMB when needed. The topography offers natural swim-throughs and ledges that shelter larger animals, and the open water above the reef often holds cruising pelagics. Throughout the dive, neutral buoyancy protects the fragile coral, and the group stays close to the guide to manage depth and any surge. The safety stop is completed in open water on a DSMB, and the boat follows the bubbles to collect divers at the exit point for a relaxed return to base. The open superstructure is best shot in the morning light, with the engine room saved for a second penetration dive."