What part of a lensatic compass protects the floating dial and contains the sighting wire?

The part of a lensatic compass that protects the floating dial and contains the sighting wire is the cover. The cover serves two primary functions: it shields the delicate floating dial from damage and keeps dirt and moisture out, which is crucial for maintaining the compass's accuracy and readability. Additionally, the sighting wire is integrated into the cover, allowing for precise alignment when taking bearings. This ensures that users can accurately navigate by aligning the compass with their desired heading while keeping the floating dial secure. The design of the cover as both a protective element and a functional feature is essential for effective use of the compass in various environments.