For a built-in-test (BIT) of the CMDS to occur, which switch position must the mode switch NOT be in?

For a built-in-test (BIT) of the Countermeasures Dispensing System (CMDS) to take place, the mode switch must be positioned in a state that allows the system to function and conduct self-checks. The OFF position inherently deactivates the system entirely, preventing any BIT from occurring. In this state, the CMDS is non-operational, and therefore it cannot perform any tests or diagnostics.

In contrast, positions such as MAN (manual), SEMI (semi-automatic), and AUTO (automatic) enable the system to be active, allowing the BIT to run as intended. The BIT is a crucial part of the system's operational readiness, ensuring that the CMDS components are functioning correctly without being hindered by an OFF mode state. Thus, the only switch position that would prevent a BIT from taking place is the OFF position.