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Glide-Slope and Long Range Line-Up Indicator System (GLIS) |
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The GLIS System has been developed by AGI to satisfy a requirement for an NVG compliant system that replaces DAPS.
This system may be used by pilots flying with NVDs, who are making their final approach to an aircraft carrier or such similar sized naval vessel.
The two SGSI projectors, situated one fore and one aft on the port side of the flight deck, provide a long range line-up indication. Intensity calculations indicate that the viewing distance would be a minimum of 2nm with a similar prevailing Met Vis. Operational experience has shown that the viewing distance is often considerably greater, with reports of 5nm not being uncommon. The beam projected by the two SGSIs is vertically colour-coded, as well as incorporating different occulting rates in the upper and lower sectors. On the correct glide slope, both SGSIs shall indicate a steady green signal to the pilot. Deviation from the correct glide path, results in one or the other projectors being seen as a flashing colour, the flashing rate of which is dependent upon whether the deviation is high or low. The system may be used with equal effectiveness either with or without NVD and has been described as an intuitive replacement for DAPS. |
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Aeronautical & General Instruments Limited, Fleets Point, Willis Way, Poole, Dorset, BH15 3SS. United Kingdom. Phone: +44 (0)1202 685661 Fax: +44 (0)1202 685670 Email: sales@agiltd.co.uk |
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