![]() The tritium lights were extremely durable throughout the test. Increasing the number of radioluminescent (RL) panels used and the distance between the panels significantly improved acquisition and usable ranges. The VASI system did not fare as well and was rated marginal by pilots. Pilots landing into the twilight of a setting sun reported as little as 1 mile acquisition range. This distance was decreased by ambient lighting more » conditions. ![]() Visual acquisition range was 3 to 5 miles under dark conditions. Nearly all pilots rated the runway lights satisfactory for use at tactical operating locations. The primary lighting layout tested was similar to that required by Military Airlift Command (MAC) regulations for C-130 operations. The lighting system was unidirectional and consisted of threshold and touchdown zone lights (each end), edge lights, and Visual Approach Slope Indicator (VASI) lights. ![]() This test was conducted to determine if the improved generation of tritium radioluminescent runway lighting could effectively support aircraft operations in the Alaskan winter environment. They required no maintenance except an occasional wipe off, and there were no failures or security violations. Increasing the number of radioluminescent panels used and the distance between the panels significantly improved acquisition and usable ranges. The VASI system was rated marginal by pilots. ![]() more » Pilots landing into the twilight of a setting sun reported as little as 1 mile acquisition range. This distance was decreased by ambient lighting conditions. The primary lighting layout tested was similar to that required by Military Airlift Command regulations for C-130 operations. ![]()
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