ICP

Drift C/O Switch - the pitch ladder on the HUD is usually aligned so that it is centered on the flight path marker. If the aircraft is in a situation where the nose of the aircraft is pointed in a significantly different direction than the actual flight path (for example, during a steep turn) the pitch ladder could be partially off the display or not visible at all. However, if this switch is set to DRIFT C/O, the pitch ladder will always be centered in the HUD, regardless of the position of the flight path. (C/O stands for "cutout" by the way). http://falcon4.wikidot.com/avionics:icp

RCL (Recall)

1st Press Deletes last digit

2nd Press Restores previous value