The term "second mate" refers to a licensed officer within the deck department of a merchant ship, tasked with navigation, safety procedures, and watchkeeping, frequently acting as the vessel's navigator and GMDSS officer. Authors have examined the concept in various contexts: maritime writers such as Richard Henry Dana and William Hope Hodgson portray the role's technical and hierarchical requirements, whereas others, like G.
Stanley Hall and Marie Stopes, employ "mate" figuratively to discuss human relationships and companionship. These varied perspectives emphasize both the actual maritime responsibilities and the wider symbolic significance of the term, illustrating its dual function in occupational and relational contexts.