Final answer:
The propulsion system of the Mk 46 Mods and Mk 54 Mods torpedoes uses a solid fuel/oxidizer mixture as propellant.
Step-by-step explanation:
The propulsion system of the Mk 46 Mods and Mk 54 Mods torpedoes does not use a magnetohydrodynamic drive as depicted in 'The Hunt for Red October.' Instead, these torpedoes use a different type of propellant: a solid fuel/oxidizer mixture. The solid mixture provides the necessary energy for propulsion and allows the torpedoes to function effectively in underwater environments.