When electrical cables penetrate watertight bulkheads, what must be provided for?

Correct Answer: Option D — a watertight stuffing tube capable of accepting packing should be employed

46 CFR 111.60-5 mandates that cable penetrations through watertight bulkheads maintain the integrity of the bulkhead. Stuffing tubes with appropriate packing glands are required to prevent water ingress between compartments, ensuring the vessel's subdivision and watertight integrity are not compromised by the electrical distribution system.