Wikipedia
Banksman
In British civil engineering, a banksman is the person who directs the operation of a crane or larger vehicle from the point near where loads are attached and detached. The term 'dogman' may be used in Australia and New Zealand, while 'spotter' is the more common term in United States.
Usage examples of "banksman".
After a startled moment, the banksman took it, gave a hasty shake, then touched the brim of his hat.