The dual power electro/diesel locomotives Gem 4/4 # 802 "Murmeltier" and # 801 "Steinbock" of the Rhaetian Railway in multiple control are on a driver training run 9439 from Chur Sand to Arosa, between Peist and Langwies, on a grade of 6.0 %. The two locomotives were built in 1966, mainly to use on the Bernina line with 1000 V DC from the overhead wire, and were rebuilt in 2002/2003.
