Engineers answering the bridge telegraph control and transmitting those wishes into the desired RPM on the propeller via the levers and controls valves on the steam engine.
Computer Aged Video of SS MASTER in False Creek in July of 2006
Triple Expansion Steam Engined Launch of Ken Hall's. Vancouver, British Columbia. Canada
The 1922 Wooden Hulled, Triple Expansion Steam Engined, Tugboat / Towboat SS Master, is the last remaining tugboat of Her type in North America. She is a classic example of the early log towing type. Built at the Beach Avenue shipyard of Aurthur Moscrop, in Vancouver, British Columbia, Canada. She is unique in that Her steam engine, built by Beardsmore in Coatsbridge, Scotland, is the port side one that would have been 1 of 2 in a Royal Navy World War 1 Minesweeper, that was ordered but never completed.