The first Loran network in Southeast Asia supported operations in which country?

• A. Vietnam
• B. Thailand
• C. Malaysia
• D. Singapore

Answer: (A)

LORAN provides long-range navigation by using a network of transmitters to let vessels and aircraft determine position from timing differences of received signals. In Southeast Asia, the first LORAN network was established specifically to support operations in Vietnam, where there were extensive naval routes, riverine patrols, and air missions that required reliable, theater-wide navigation. This deployment helped U.S. and allied forces navigate more precisely across coastal areas, waterways, and air corridors during the Vietnam conflict. The other locations—Thailand, Malaysia, and Singapore—weren’t the initial theater for this first Southeast Asian network, making Vietnam the correct context for the first deployment.