The International Civil Aviation Organization (ICAO) is a specialized agency of the United Nations that sets global standards and recommended practices for civil aviation. One of the key documents published by ICAO is Doc 8168, also known as the "Procedures for Air Navigation Services" (PANS-OPS). In this blog post, we will focus on Volume 3 of Doc 8168, which provides guidelines for the planning and design of instrument procedures.
Understanding ICAO Doc 8168 Volume III: Aircraft Operating Procedures (PANS-OPS)
: Provides specific procedures for flight crews to maintain safety during various phases of flight. Normal Operations icao doc 8168 volume 3
Guidance for conducting safe operations on parallel or near-parallel instrument runways .
Many pilots mistakenly believe that is just for air traffic controllers. This is false. While controllers use it to determine separation standards, Volume 3 is specifically for procedure design . However, professional pilots—especially those undergoing command training or interviewing for major airlines—are increasingly tested on Volume 3 concepts. The International Civil Aviation Organization (ICAO) is a
This document is divided into three volumes:
Accurate altitude readings are critical for avoiding terrain and preventing mid-air collisions. Volume 3 outlines strict rules for transitioning between local barometric pressure settings (QNH/QFE) and the standard altimeter setting (1013.25 hPa / 29.92 InHg). It defines: Understanding ICAO Doc 8168 Volume III: Aircraft Operating
While Volume II defines how big an obstacle clearance area must be, Volume III dictates the maximum speeds, bank angles, and wind configurations the pilot can use to stay within that protected airspace. If a pilot exceeds the speeds or bank angle limits specified in Volume III, the aircraft may drift outside the designed obstacle clearance zone.
Procedures for visual segments of instrument approaches, including circling maneuvers near airports.