An aneroid-type baroswitch served as the pressure sensor.
2.
The recovery sequence begins with the operation of the high-altitude baroswitch, which triggers the pyrotechnic nose cap thrusters.
3.
Space Shuttle " Discovery " following the launch of STS-116, floating in the Atlantic Ocean about 150 miles northeast of Cape Canaveral . ] ] After the drogue chute has stabilized the SRB in a tail-first attitude, the frustum is separated from the forward skirt by a pyrotechnic charge triggered by the low-altitude baroswitch at a nominal altitude of about 243 seconds after SRB separation.
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