I think most generally it’s because naval analogues are probably the closest when you’re talking about large space-based fighting vessels. The air force doesn’t operate aircraft carriers, battleships, or destroyers. The navy, however, does (or did in the case of battleships). Those large sea based vessels often class quite nicely into a lot of sci-fi media for large ships.
The small ships you see are often based off of a carrier equivalent. Even when they’re terrestrially based, it makes a lot of sense to streamline your military structure to have just one “space force”, rather than trying to break it up into two entities like the “space navy” and “space air force”, each with their own standards and logistical supply networks.
That’s always been my take. The Navy has the experience with big-ship operations, and operating
smaller craft from those large ships, and it’s supply and logistics would likely evolve from ocean to space faring ships.
The Marines are historically an amphibious force,
an extension of the Navy, specialized in ship-to-ship and ship-to-shore operations; ship-to-surface would be the evolution of that.
Additionally, aviation terminology is often very specialized, usually pertaining to aerodynamics and the like. But ship terminology is often more general.
For example, airplanes have aerofoils and control surfaces, where ships (both space and maritime) have thrusters.
I think most generally it’s because naval analogues are probably the closest when you’re talking about large space-based fighting vessels. The air force doesn’t operate aircraft carriers, battleships, or destroyers. The navy, however, does (or did in the case of battleships). Those large sea based vessels often class quite nicely into a lot of sci-fi media for large ships.
The small ships you see are often based off of a carrier equivalent. Even when they’re terrestrially based, it makes a lot of sense to streamline your military structure to have just one “space force”, rather than trying to break it up into two entities like the “space navy” and “space air force”, each with their own standards and logistical supply networks.
That’s always been my take. The Navy has the experience with big-ship operations, and operating smaller craft from those large ships, and it’s supply and logistics would likely evolve from ocean to space faring ships.
The Marines are historically an amphibious force, an extension of the Navy, specialized in ship-to-ship and ship-to-shore operations; ship-to-surface would be the evolution of that.
I think this is mainly it.
Additionally, aviation terminology is often very specialized, usually pertaining to aerodynamics and the like. But ship terminology is often more general.
For example, airplanes have aerofoils and control surfaces, where ships (both space and maritime) have thrusters.
I want a meme where the air force is like “we conquered the skies, next is space!” And the Navy is like guess what MFers.
Halo has the UNSC Navy, the UNSC Marines, and the UNSC Army working together in space.