Reaper is the only UK remotely piloted air system (RPAS) and has been armed with precision guided weapons since May 2008. As of
Reaper is not an autonomous system and all weapons employment depends upon commands from the flight crew. The weapons may be released under the command of a pilot who uses Rules of Engagement (ROE) that are no different to those used for manned UK combat aircraft. The targets are always positively identified as legitimate military objectives, and attacks are prosecuted in strict accordance with the Law of Armed Conflict and UK ROE. Every effort is made to ensure the risk of collateral damage, including civilian casualties, is minimised.