South Pass is the southern entrance into Truk Lagoon in Truk Lagoon in Chuuk State (Truk) in the Federated States of Micronesia. Also known as "South Passage". Borders Faleu Island to the west.
During the war, South Pass was kept open by the Japanese as the main passage for Japanese shipping entering Truk Lagoon. Underwater detection coils located on nearby Faleu
sensed magnetic variations to detect the passing of ships. Japanese ships would maneuver to a clear the channel safely. Inside the lagoon was a 3,000m deep field of moored sea mines with contact detonators.
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February 4, 2018