Each aircraft has its own chart of numbered manoeuvres with codes for direction, speed and altitude tolerance.
How it works
Codes like 20R3 give manoeuvre number, direction and speed (also fuel cost), with flight tolerances (C, C1, D, D1, L, X). Restricted manoeuvres (27-36) need a previous simple straight (2-4); bracketed non-repeatable ones cannot follow each other; Stability A/B aircraft must fly straight between left and right turns. Early and Late War schedules differ.
Some maneuvers (num- bered 27-36) may only be selected if the previous maneuver was a simple straight flight (maneuvers numbered 2, 3, or 4).

