This document defines the Minimum Operational Performance Standards (MOPS) for an Offshore Helicopter Terrain Awareness and Warning System (Offshore HTAWS). These standards specify system characteristics that are intended to be useful to designers, manufacturers, installers, and users of Offshore HTAWS.

The term "Offshore HTAWS" as used herein includes all the functional components necessary to properly perform the intended function. However, all external components to the function which are cockpit, aircraft, or system specific, though necessary for proper operation of the function at a system level, are out of the scope of the system requirements (e.g. cockpit controls, cockpit indicators, cockpit displays, aural systems, inputs, and sensors). Note that any databases that might be required by the Offshore HTAWS are not considered to be part of the system as defined in this document.