What defines a ready-shelter in the context of protection?

A ready-shelter, in the context of protection, is designed to provide personnel with a balance of safety and operational readiness. Specifically, being just inside the weather envelope allows for effective protection against environmental elements while still maintaining access to deep shelter if necessary. This positioning offers a strategic advantage; personnel can respond to threats or operational needs more quickly than if they were completely enclosed or located farther away from the ship's central line.

Having access to deep shelter means that if conditions worsen or a significant threat arises, individuals can quickly move to a more secure location with enhanced protection. This flexibility is critical in environments where operational conditions can change rapidly. In contrast, other options do not provide the same blend of readiness and protection—being outside the weather envelope or completely enclosed might hinder quick access to necessary resources.