In "The Surgeon's Mate," Dr. Maturin frequently employs nautical expressions, reflecting his pride in this knowledge. His use of phrases, regardless of their accuracy, showcases his satisfaction, similar to how others might express appreciation for a well-placed quotation in Greek or Latin. This trait highlights his character's depth and background, emphasizing a blend of intelligence and a passion for the sea.

During a conversation, he adds another idiom, "And brought him up with a round stern," demonstrating his enjoyment in sharing these expressions. This serves to color Maturin's personality, making him a more vivid character in the narrative. His flair for language not only entertains but also enriches the maritime themes present in the story.