GPS chartplotters for fans of the metric system
The popular Humminbird gps chartplotter devices distributed in the US are set up for the English language and system of units. Humminbird also makes devices with support for other languages and metric units, but does not offer these for distribution in the United States. (Metric units are commonplace in scientific circles in the United States, but imperial units remain deeply entrenched in the marine world.) Users wanting support for other languages and metric units have to find a Humminbird distributor in their region of the world to supply it. Johnson Outdoors owns Humminbird and can help you get an international version of a Humminbird product if you need one.