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131. The various auxiliary diesel engines fitted on your harbor tug may employ a variety of different cranking methods for engine starting. What type of cranking motor is shown in the illustration
The illustration depicts an air cranking motor, characterized by a vane-type pneumatic motor lacking electrical windings and featuring a cylindrical rotor with sliding vanes. This design is typical for auxiliary diesel engines on harbor tugs, utilizing compressed air for starting and distinguishing it from electric, gasoline, or hydraulic systems which would display corresponding components.
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