It has the same construction as the control post of 12" gun of Kuivasaari. The switcher points to "Lock open". Clockwise: "1-st half-charge, loading forth-back", "2-nd half-charge, loading forth-back", "Projectile, loading forth-back", "Shut the lock", "Stop". All you need after that is stop your ears and press the special button on the floor.
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