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02.4 Flight Levels & RVSM

Training Objective

To ensure correct application of vertical separation and flight level allocation.

Key Knowledge

  • Flight level system
  • Transition altitude and level
  • RVSM airspace
  • Directional cruising levels

Operational Application

Controllers shall:

  • Assign correct flight levels based on direction
  • Maintain vertical separation
  • Apply RVSM rules where applicable

1. Overview

Flight levels are used to ensure vertical separation between aircraft.

2. Core Content

2.1 Flight Levels

  • Based on standard pressure (1013 hPa)
  • Expressed as FL (e.g. FL350)

2.2 Transition Altitude / Level

  • Transition altitude: lowest usable flight level
  • Transition level: lowest available FL above TA

2.3 RVSM (Reduced Vertical Separation Minimum)

  • Applies between FL290–FL410
  • Reduces vertical separation to 1000 ft

2.4 Directional Levels

  • Eastbound vs westbound allocation
  • Based on magnetic track

3. Procedures

3.1 Level Assignment

  • Assign levels according to direction and traffic
  • Ensure no conflict with adjacent aircraft

3.2 Non-Standard Level Allocation

Controllers may assign non-standard levels:

  • To resolve conflicts
  • To manage traffic flow
  • To accommodate climb/descent profiles

3.3 Level Capping

Controllers may restrict climb:

  • To maintain separation
  • To integrate traffic into sector flow
  • Due adjacent sector constraints

3.4 Opposite Direction Traffic

  • Standard level allocation may be overridden
  • Separation shall be ensured using alternative methods

4. Standards

  • 1000 ft separation in RVSM
  • 2000 ft outside RVSM (where applicable)

5. Notes

  • Incorrect level assignment is a common cause of conflict