S-3547, nicknamed "Tugboat", was a clone trooper who served in the Grand Army of the Republic. He was stationed at the training academy on Bakura for most of his career.
Tugboat originally started-out as a crewman in the 333rd, however he was one of the few clones selected to be a combat pilot. His pilot training was initially conducted over Ruusan with his progress monitored by B-9443.
Due to Tugboat successfully completing his pilot training, he was eventually accepted into Tyrian Squadron.