mickjoebill
Radar detection of break-up - it depends on the radar equipment. If the equipment is a mix of Primary and Secondary radar then yes it is quite likely that a break-up can be seen ( as with Lockerbie Panam ). On the otherhand, if it is Secondary only then once power on board is lost the transponder response is also lost and until that time, the only radar return would be from the transponder irrespective of whether the airframe was intact or not...