Failure of both port ballast pumps on the DEEP DRILLER prevents their use. To deballast from tank 1P, you may use the __________.

Correct Answer: Option D — starboard ballast pump and the crossover system

Ballast systems are designed with cross-connection piping to provide redundancy. If a primary pump fails, the crossover system allows the remaining functional pump to draw from or discharge to tanks normally serviced by the failed unit, ensuring the vessel maintains the ability to correct list and trim during emergencies.