The FTS-417/437 Omni-directional Approach Lighting System (ODALS) is used as a simple approach lighting system for non-precision approach runways. ODALS are used instead of (or to replace) Transport Canada type Low-Intensity approach lighting systems. The system consists of seven units, five lead in lights spaced at 90m intervals, in line with the runway centerline, to 450m from the threshold and two units placed perpendicular to the runway C/L on either side of the runway threshold, 12m from the runway edge. The FTS-417 is a voltage-powered system requiring a 120 or 240V AC power supply and separate control wiring for intensity control. The FTS-437 is a current-powered system obtaining power and brightness control direct from an airfield series circuit through a 300W 6.6A isolating transformer (10kW CCR recommended per system).
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