This Federal Aviation Administration (FAA) Instrument Rating Airplane Airman Certification Standards (ACS-8C) supersedes the previous edition (ACS-8B), and is the guide for students, instructors, and evaluators to understand what applicants must know, do, and consider to pass their FAA Knowledge Exam and practical (checkride) and earn their instrument rating in the airplane category, single-engine land and sea, as well as multi-engine land and sea classes (ASEL, ASES, AMEL, AMES).. This ACS includes the aeronautical knowledge, risk management, and flight proficiency standards necessary for certification, ACS codes, and the Companion Guide.