Sea Rogue's uncle is the uncle of Sea Rogue. His real name is unknown, however, he was nicknamed Old Man.
Sea Rogue's uncle was once trapped in an old warehouse by some pirates. The pirates made his nephew, Sea Rogue, steel barges for them in order to set him free, otherwise, they would scuttle him. One night, Sea Rogue was found by Ten Cents and Sunshine. After some explaining done, they came up with a plan to capture the pirates. Meanwhile, Zip and Zug found the old warehouse and the stolen barges, but were soon chased out by the pirates. After they had left the old warehouse, Grampus went to save Sea Rogue’s uncle. In the morning, Sea Rogue and his uncle left for Up River.
Old Man's livery consists of a black hull, a light orange superstructure and an orange funnel. He wears a black bowler hat.
- Old Man is one of the characters that only has one face mask, the other being Frank and Eddie, Old Rusty, Burke and Blair and Johnny Cuba.
- Old Man's model was later turned into Boomer, however, there are some hints that the model was in the midst of being changed back into Old Man to prepare for the cancelled second season (his funnel was red and Boomer's was green, but the red funnel is the one on the model).
- After Tugs' production ended, Old Man's model was sold to the The Star Tugs Company.