Betty Bomber (G4M) - Chuuk (Truk) Lagoon

15m Max

10-30m Vis

boat

Site Overview

Betty Bomber (G4M) is one of the most celebrated dive sites in Chuuk (Truk) Lagoon, a Japanese G4M bomber in very shallow 5 to 15 m water, with a largely intact coral-encrusted fuselage and abundant macro life. The site is defined by a Japanese G4M 'Betty' bomber resting in 5 to 15 m with a largely intact fuselage, wings and coral-encrusted frame now home to macro life, creating an underwater landscape that rewards divers with every visit. The airframe is abundant with nudibranchs, small crustaceans, lionfish and gobies, while soft corals and moray eels add colour to the wreckage. Water clarity in this part of the Federated States of Micronesia is frequently excellent, with visibility often extending well beyond 10 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 Betty Bomber (G4M) 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 Betty Bomber (G4M) 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. Betty Bomber (G4M) 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 nudibranch, macro crustaceans, lionfish, soft coral, moray eel, gobies, makes every descent memorable.

Dive Briefing

"The dive at Betty Bomber (G4M) 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 japanese g4m 'betty' bomber resting in 5 to 15 m with a largely intact fuselage, wings and coral-encrusted frame now home to macro life, divers are immediately surrounded by nudibranch, macro crustaceans, lionfish, soft coral, with the reef revealing more detail the closer you look. The maximum depth reaches about 15 metres, while the average depth sits near 10 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 shallow depth makes it a perfect afternoon or snorkel dive, with the best light around mid-morning."