A fire-fighting train, the LRZ NT ("Lösch- und Rettungszug Neue Technologie") was developed by Windhoff and partners (2003) for Swiss rail operators Bern-Lötschberg-Simplon (BLS) and Swiss Federal Railways (SBB-CFF-FFS) for initial use on the Lötschberg Base Tunnel. Windhoff supplied the basic train technology, derived from their MPV design. SBB acquired a three vehicle two engined train, whilst BLS acquired a four-vehicle, three-engined train (both with one unpowered vehicle). The SBB trains comprise one fire fighting vehicle, one non-powered vehicle with the water/foam supply and breathable air supply, and a rescue vehicle with space for 60 people. The BLS train has an additional rescue vehicle. Both versions are powered by MTU 6H1800 R80 type engines of power.