What preparations are necessary when entering Hurricane Level 4?

Maintaining a 70% fuel capacity is critical when entering Hurricane Level 4 conditions because it ensures sufficient fuel for emergencies and operations as necessary during the storm. This fuel reserve provides the ability to operate necessary machinery and equipment, particularly propulsion and maneuvering systems, if the vessel faces rough seas or needs to reposition. Additionally, fuel can be necessary for power generation, especially if the ship's systems become compromised due to weather conditions.

Other preparations, while important in their own right, do not specifically address the operational readiness and safety of the vessel in the same way that maintaining a fuel reserve does. Fuel capacity plays a key role in the overall strategy for vessel stability, safety, and preparedness in extreme weather conditions like those associated with Hurricane Level 4.