Final answer:
Navy watches are divided into deck watches, used for navigation and general ship use, and diver's watches, designed for underwater activities with features like increased visibility and pressure resistance.
Step-by-step explanation:
Navy watches can be divided into two major categories based on their functionality and use. The first category consists of deck watches, which are used for general ship use and can be employed for navigation purposes, typically by officers on the bridge.
The second category of navy watches is diver's watches, which are specially designed for underwater activities and are water-resistant to a certain depth. These watches have features tailored to the needs of divers, such as increased visibility and pressure resistance.
Additionally, navy watches are tools reflecting advancements in maritime technology and have played critical roles in naval history, including in events such as the naval arms race period.