Crab - Sad fact, use of Radar, Taws, TCAS not included in basic TR course as they are 'customer specific options'. Before you ask I guess the vast majority of aircraft built have those 'options' on board. Training for this equipment is the responsibility of the owner/operator.
I think we have to accept that SAR involves the occasional need to venture into areas that are not entirely regulated so then the crew must fall back on their skill and experience. They have their own special versions of what are referred to as 'Black Swan Events.
G.