Initiate coast tracks only in Flight Plan Aided Tracking (FLAT) mode, except “free” coast tracking may be used as a reminder that aircraft without corresponding computer-stored flight plan information are under your control.
1. To ensure tracks are started in FLAT mode, perform a start track function at the aircraft’s most current reported position, then immediately “force” the track into coast tracking by performing another start function with “CT” option in field 64. Making amendments to the stored route with trackball entry when the aircraft is rerouted, and repositioning the data block to coincide with the aircraft’s position reports are methods of maintaining a coast track in FLAT mode.
2. EBUS does not have the capability to initiate coast tracks.
Prior to initiating a coast track, ensure that a departure message or progress report corresponding with the aircraft’s current position is entered into the computer.
As soon as practicable after the aircraft is in radar surveillance, initiate action to cause radar tracking to begin on the aircraft.