Furuno 1815 - Units Menu

5. OPERATION
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5.34.4 Units menu
You can select the unit of measurement for range, ship speed, depth, temperature and
wind speed on the [Units] sub menu in the [System] menu. You can not open this sub
menu in normal operation. To open this menu, select [Units], hold the MENU/ESC key
and press the ALARM key five times.
Units sub menu
[Range Unit]: NM, KM, SM
[Ship Speed Unit]: kn, km/h, mph
[Depth Unit]: m, ft, fa, pb, HR
[Temperature Unit]: °C, °F
[Wind Speed Unit]: kn, km/h, mph, m/s