In order to use either the hand pumps or ratchet system to move the rudder manually, which of the following must be true?

Correct Answer: Option C — Both A and B

Emergency steering requires isolating the hydraulic system from the main power pumps to prevent back-pressure or damage. The hydraulic lines must remain intact to transmit fluid pressure to the steering rams, allowing the manual pump or ratchet mechanism to physically displace the rudder for emergency maneuvering.