While pilots do not usually read Volume III directly, it dictates what is in their . If a pilot wants to fly an RNP approach, Volume III is the reason they had to undergo specific simulator training to get that rating.
: Guidelines for maintaining safe maneuvering space. icao doc 8168 volume 3
Why the least-discussed volume of the Aircraft Operations "Bible" is critical for flight safety. While pilots do not usually read Volume III
: Assumes standard operating conditions, leaving contingency and emergency procedure development to individual operators. GlobalSpec Key Features & Technical Sections icao doc 8168 volume 3