Already around 1930, Markus and Realf saw that the surface-ignition engines would be replaced by pure diesel engines. Textbooks about this type of engine were purchased, and they started the development of a 2-stroke diesel engine with Bosch fuel pumps and fuel valves. One of the prototypes came out in 1938-39 and was utilised up to 1946 in the production of electricity in the winter when the company’s own hydro-power plant had too little water. The main components of this prototype were taken care of. The aim was to get under way with ordinary production as soon as the 2nd World War was over, but Markus gave up these plans when he realised that mass-produced high-speed 4-stroke diesel engines would take over the fishing boat market in just a short time.
The company carried on further as a pure repair workshop until the middle of the 1970s. In that period, a number of power generators were also installed for the Norwegian Armed Forces and NATO. After that, the company also began to build aluminium and steel fishing boats up to 88 feet in length. Conversion of seiners to shrimp trawlers constituted a significant amount of the company’s activity in the 1980s, and in the 90s, many fishing boats were lengthened with the addition of a shelter deck. The Norwegian National Coastal Administration was also an important customer with assignments involving the repair and conversion of dredging barges.
In 1998, they decided to focus their operations on the construction of aluminium workboats. Internal training measures were implemented and a lot of new equipment was purchased. GMV has made substantial investments in the development of its own designs in close collaboration with its customers. The company is also taking part in R&D projects together with other shipbuilders, SINTEF and NTNU. This has resulted in new construction methods that result in stronger boats with a better finish and lower construction costs. A new and very efficient facility went into use in 2007. GMV delivered eight fish-farming boats in 2008 and is currently one of the leading builders of boats for the fish-farming industry.