What is the Navy term for any sailor?

The term commonly used to refer to any sailor in the Navy is "Jack." This term reflects a historical tradition within naval culture. "Jack" originates from the 17th century and has been used colloquially to refer to sailors in a more informal context.

While "squid" is also sometimes used informally to denote sailors, it tends to have a connotation that can be perceived as derogatory or dismissive. "Seafarer" is a broader term that applies to anyone who works at sea, not specifically to naval personnel. The term "deckhand" denotes a specific role, typically one focused on deck operations, rather than implying any sailor at large. Thus, "Jack" most accurately captures the Navy's term for any sailor.