What frequency range does the HF band cover?

The HF (High Frequency) band is defined as covering the frequency range from 3 MHz to 30 MHz, which corresponds to the typical classification used in radio communications. More precisely, the common reference for the HF band is often established as covering frequencies from 3 MHz (minimum) to 30 MHz (maximum). The option that states 1.6-29 MHz may also reflect certain regulatory frameworks or older communication standards that organize frequency bands slightly differently, but generally, when considering what frequencies are categorized under the HF band, 3-30 MHz is the widely accepted range. Therefore, the answer provided correctly aligns with the characteristics of the HF band as it encompasses the frequencies typically utilized for various forms of radio communication, including amateur radio, maritime, and aeronautical communication.