For communication at sea, use is made of the short wave (HF) and medium wave (MF). Worldwide communication is possible via the short wave (HF). The medium wave (MF) is usable up to approximately 150 nautical miles. De Boer Marine’s range consists of various channels from various suppliers. In consultation with our customers and based on our experience, we are happy to advise on the various options.
The shortwave is used because the radio signals at these frequencies are reflected by the ionosphere. This makes it possible to communicate worldwide with a relatively modest power (100 W). However, the composition and thus the reflection of the ionosphere varies under the influence of the sun. As a result, the frequency to use varies with the time of day. For this reason, there are a number of frequency bands in the HF in use for marine radio communications.