The amount of taxi time allowed for in the slot calculation is supplied by the aerodrome concerned and is often dependent on the rwy in use.
This figure can be changed dynamically in the slot machine if an aerodrome makes us aware of a specific problem (e.g. taxiway closure, w.i.p., fog, runway change etc.)to anything between 0 and 40 minutes .
If a longer taxi time is entered then allocated slots will be revised to a later time.
The trick is knowing when to change the taxi time! I suppose that's down to the experience of the Tower supervisor.
flowman
Last edited by flowman; 19th November 2002 at 17:58.