Question 908 Deck General

The correct answer is A) Notify the engine room. Before energizing the cargo hold ventilation on a Ro-Ro (roll-on/roll-off) vessel, prior to loading or discharging cargo, the engine room must be notified. This is because the cargo hold ventilation system is typically connected to the vessel's power plant, and the engine room needs to be prepared to provide the necessary power and ensure the proper functioning of the ventilation system. Notifying the engine room allows them to monitor and control the ventilation system to maintain the desired air quality and safety conditions in the cargo hold. The other answer choices, while potentially important in other scenarios, are not the primary action required before energizing the cargo hold ventilation on a Ro-Ro vessel.