本文件的推荐做法适用于安装在运输类飞机内部或同等可燃性环境中的光学设备和相关光缆和连接器。 本文件涵盖波长范围从380nm至10 μ m的光辐射。如本文所述，低于该范围的波长能够通过本期ARP7977未考虑的点火机制点燃燃料-空气混合物。使用380 nm至10 μ m范围之外的波长应与相关认证机构讨论。

The recommended practices of this document are intended for optical devices and associated optical cables and connectors installed inside transport category aircraft or environments of equivalent ignitability. This document covers optical radiation in the wavelength range from 380 nm to 10 μm. As explained in this document, wavelengths below this range are capable of igniting fuel-air mixtures through an ignition mechanism not considered at this issue of ARP7977. Use of wavelengths outside the range 380 nm to 10 μm should be discussed with the relevant Certification Authority.