What frequency range is primarily used for fleet navigation and satellite communications?

The correct choice reflects the frequency range employed for fleet navigation and satellite communications. High Frequency (HF) bands, typically ranging from 3 MHz to 30 MHz, are widely utilized for long-distance communication, including maritime and aeronautical applications. This range is particularly effective for over-the-horizon communication because HF signals can be refracted by the ionosphere, enabling them to travel larger distances than those achievable by lower frequency bands.

This characteristic makes HF suitable for fleet operations where reliable communication over extended ranges is vital. Satellite communications also benefit from HF because some satellite systems can operate within this frequency range, enabling coverage over vast geographic areas. Thus, using HF for fleet navigation and communications supports efficient and effective operational requirements in maritime and satellite contexts.