From my reading of naval strategy, the carrier wouldn't want to be sending out that much radar for SigInt purposes. Radar can be detected much further away than

From my reading of naval strategy, the carrier wouldn't want to be sending out that much radar for SigInt purposes. Radar can be detected much further away than what can be detected by the carrier. That's one reason why they use the E2s. The E2s can fly off and see over the horizon, and then just link their data back to the fleet. So why would the carrier need this additional expense?