IS refers to which of the following naval ratings?

The designation "IS" in naval ratings specifically refers to Intelligence Specialist. This rating is crucial as it encompasses a wide range of responsibilities related to gathering, analyzing, and disseminating intelligence information that can impact naval operations and decision-making. Intelligence Specialists are trained to work with various forms of data, including signals intelligence, imagery intelligence, and human intelligence, among others, to support the mission objectives of the Navy.

While the other options mention terms that might sound relevant in certain contexts (like Information Systems, which pertains to the management and operation of information technologies), they do not align with the official naval rating of "IS." The focus of an Intelligence Specialist is specifically on intelligence operations and analysis rather than broader or unrelated fields such as infrastructure or supervisory roles. This distinction is important for understanding roles within the Navy and the specific training and competencies that come with them.