Question 788 Deck General

The correct answer is C) Two portable vapor detectors suitable for the cargoes carried. This is because tankships carrying hazardous cargoes in bulk are required to have certain special safety equipment, but portable vapor detectors are not one of the mandatory requirements. The other answer choices (A, B, and D) are all examples of required special safety equipment for these types of vessels, per Coast Guard regulations. However, portable vapor detectors, while recommended, are not explicitly mandated as part of the required safety equipment.