Modern aircrew training devices (ATDs) are equipped with sophisticated hardware and software capabilities, known as advanced instructional features (AIFs), that permit a simulator instructor to prepare briefings, manage training, vary task difficulty/fidelity, monitor performande, and provide feedback for flight simulation training missions. The utility and use of the AIF capabilities of Air Force ATDs were explored by means of a survey of 534 simulator instructors from Air Training Command, Military Airlift Command, Strategic Air Command, and Tactical Air Command training sites. The primary purpose of the survey was to provide a database that could be used in defining the requirements for ATD procurement and in developing future ATD training programs. The results indicated that, in general, the features that were rated highest were those used for training management, variation of task difficulty/fidelity, and monitoring student performance. The level of AIF use was affected somewhat by hardware and/or software unreliability, implementation time, functional limitations, and design deficiencies. However, the presumed training value of an AIF was the most important determinant of its use. Recommendations were made concerning the AIF capabilities of future ATDS and research aimed at determining the principles of effective AIF use. The survey instruments are appended.