What does "fast" refer to in naval terminology?

In naval terminology, "fast" refers to being snugly secured. This usage stems from the need to ensure that vessels or equipment are tightly fastened to prevent movement that could be dangerous, especially in turbulent conditions or during operations. When a ship is "made fast," it means that it has been properly tied up to a dock or secured in such a way that it remains in a fixed position. This term emphasizes the importance of reliability and safety in naval operations.

While the other choices may relate to concepts in a naval context, they do not capture the specific meaning of "fast" in this terminology. The idea of being on high alert refers to readiness but does not convey the notion of physical security. Quick deployment of resources relates more to response times rather than securing them. The speed of a vessel, while important, addresses a different aspect of naval operations and does not align with the definition of being "fast" as snugly secured.