Marcus Island LORAN-C transmitter

The Marcus Island LORAN-C transmitter extends across Marcus Island with transmission equipment designed for long-range radio navigation signals in the Pacific Ocean.

The facility began operations in 1963 under United States Coast Guard management before transferring to Japan Coast Guard control in October 1993.

The transmitter station represented a connection point between American and Japanese maritime operations, supporting navigation needs for vessels from multiple nations.

The station operated with 4000 kilowatts of power until 1993, providing essential navigation signals to ships and vessels throughout the Northwest Pacific region.

The original transmission mast reached 411.48 meters, exceeding the height of Tokyo Tower and standing as the tallest structure in Japan during its time.

Location: Ogasawara Village

Inception: 1963

Part of: Loran-C

GPS coordinates: 24.28556,153.98167

Latest update: May 27, 2025 13:28