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HF is an effective alternative, and, for this reason, it is still widely used by militaries globally. While most law enforcement agencies and first responders operate on VHF and UHF systems, many organizations still use HF.

The High Frequency (HF) band is most useful in shortwave radio applications, as well as aviation air-to-ground communications. Dipole antennas, such as the Yagi, quad, and log-periodic antennas, operate within the higher frequencies of the HF band.

SHARES is a multi-agency system that used frequencies assigned to several different agencies and organizations. It conducts weekly radio check nets every Wednesday at 1600 UTC on 6765 USB, 6845 USB and 6910 USB (and likely other frequencies at other times).

The band is used by international shortwave broadcasting stations (2.310 - 25.820 MHz), aviation communication, government time stations, weather stations, amateur radio and citizens band services, among other uses.

The SHAred RESources (SHARES) High Frequency (HF) Radio Program, administered by the Department of Homeland Security's (DHS) National Coordinating Center for Communications (NCC), provides an additional means for users with a NS/EP mission to communicate when landline and cellular communications are unavailable.

The safe and gentle oscillating and oxygenating power of high frequency electrical current has been shown to enhance blood circulation, increase collagen and elastin production, eliminate toxins and acne-causing bacteria, encourage lymphatic drainage, exfoliate dead skin cells and improve skin care product absorption.

The band is used by international shortwave broadcasting stations (2.310 - 25.820 MHz), aviation communication, government time stations, weather stations, amateur radio and citizens band services, among other uses.