本手册旨在通过向认证机构和申请人提供有关当前附件16第二卷预期含义的指南，促进国际民航组织附件16-环境保护第二卷-飞机发动机排放的统一实施，排放标准和被认为可接受的证明符合这些标准的具体程序。

The aim of this manual is to promote uniformity in the implementation of ICAO Annex 16 - Environmental Protection, Volume II - Aircraft Engine Emissions, by providing guidance to certificating authorities and applicants regarding the intended meaning of the current Annex 16, Volume II, emissions Standards and the specific procedures that are deemed acceptable for demonstrating compliance with those Standards.