Finnish military officer & engineer. Invented the liquid-filled compass (patented 1932). Founded Suunto 1936 in Helsinki. Suunto evolved from compasses to dive computers (1965) to GPS / sports watches (Spartan, 9 series). Acquired by Amer Sports 1999, then by Chinese Liesheng Group 2022. Today focused on diving + adventure sports + multisport. Direct rival to Garmin in serious athlete + diver markets.