If a magnetic compass is 'dead beat', what does this mean?

When a magnetic compass is described as 'dead beat', it refers to its ability to remain stable and not swing when the vessel is tilted or in motion. A dead beat compass does not oscillate or move erratically, allowing for quick and accurate readings. This stability is crucial in navigational situations, especially when a prompt and precise heading is needed for safe maneuvering.

In contrast, a compass that is spinning uncontrollably would not provide reliable directional information. An accurate compass can also exhibit other characteristics, but 'dead beat' specifically highlights the stability aspect rather than overall accuracy. Meanwhile, indicating a reverse heading does not pertain to the behavior of a dead beat compass; this refers to a compass providing a heading opposite to what is expected. Thus, the definition of a dead beat compass centers on its lack of movement when tilted, making it effective for navigation.