其实是这样的:AREA Track can be accessed in two ways: 1) TMS forward and hold, or 2) TMS right.
AREA Track is commanded as long as the TMS-forward is held. When TMS forward is released, POINT Track is commanded.(If the target cannot be POINT tracked because the target does not have sufficient edge detail, the TGP automatically defaults to AREA Track,这就是为什么在BMS4中的大多数情况下短按TMS forward就直接进AREA的原因,跟那个bug也有关系)