private void updateRACButton() {
final Entity ce = ce();
if (null == ce) {
return;
}
setUnjamEnabled(ce.canUnjamRAC()
&& ((gear == MovementDisplay.GEAR_LAND)
|| (gear == MovementDisplay.GEAR_TURN) || (gear == MovementDisplay.GEAR_BACKUP))
&& (cmd.getMpUsed() <= ce.getWalkMP()));
}