Sequence System
Boost Insert Squib Bus Arm-Safe Switch
The boost-insert squib bus arm-safe switch is a four pole, double throw toggle switch. In the ARM position, this switch arms the BIA squib buses I and 2 and the BIA Common control bus. These buses arm the SEP SPCFT switch-indicator, the BOOST CUTOFF 1 and 2 circuit breakers, the BOOST INSERT CONTROL I and 2 circuit breakers, and the relay contacts which fire the nose fairing Jettison, scanner cover Jettison, OAMS activate, RCS activate, spacecraft separate, guillotine and pyrotechnics.