本文件的建议适用于能够执行正常角度和陡坡IMC进近的飞机，后者被定义为最终进近段角度大于4°的进近。此类飞机可包括常规和STOL固定翼飞机、商用航空运输和/或公用和普通直升机、复合直升机和电动升降车辆（倾转旋翼、倾扇、倾翼等）。

The recommendations of this document apply to such aircraft as are able to perform both normal angle and steep IMC approaches, the latter being defined as those approaches having a final approach segment angle greater than 4¿¿. Such aircraft can include both conventional and STOL fixed-wing aircraft, commercial air transport and/or utility and normal category helicopters, compound helicopters and powered lift vehicles (tiltrotors, tiltfans, tiltwings, etc.).