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To bring to the attention of the aircraft designer and user the problems that can result from the fight crew experiencing glare. To improve visibility conditions for the flight crew by minimizing conditions which contribute to glare.

This document specifies that black is the only color that can be used for the insulator at the bottom of the base of T-1 and T-1 ¾ Flanged Base lamps.

This SAE Aerospace Recommended Practice (ARP) reviews the basics of NVIS compatibility and discusses the specific illuminated pushbutton switch and indicator requirements for sunlight readability, color, luminance, and NVIS radiance when used in NVIS compatible cockpits. The recommendations and special considerations set forth in this document are made to give the design engineer a better understanding of MIL-L-85762A and MIL-STD-3009 NVIS compatibility requirements and to provide information on the visual characteristics of NVIS compatible pushbutton switch and indicators. The recommendations are primarly for military aircraft since civilian aircraft FAR requirements typically do not cover NVIS applications with the exception of those covered by RTCA/DO-275.

This document is a tool for the certifying authority, cockpit designers, instrument suppliers, lighting suppliers, and component suppliers. It is an aid to understanding and meeting relavant regulatory requirements, particularly those relating to pilot compartment view {CFR 25.773(a)(2)} and instrument lights {25.1381(a)(2)} for glare arising from visible eletromagnetic radiation.