The MS Jungfrau sails on Swiss Lake Brienz. It offers 700 passengers the opportunity to sail one of several routes on the lake on a 48-metre motor vessel. The MS Jungfrau is operated by BLS, Lake services and is the oldest motor vessel in the fleet.

It was built in 1954. In 2020, the classic diesel engine that was there to propel the ship was replaced by a hybrid energy propulsion system.

FIFI4MARINE was asked to supply a fire extinguishing system. A fire extinguishing system with a capacity of 115 litres was delivered for this purpose. This allows the service provided to be carried out safely It is thus safe for the crew and large number of guests transported each year.