Fluffy Bunny Feet
Cosmic Mongoose
Now because it's a class A, the highport will be a nice big shiny space station.
Why?
The high port might very well be built into an asteroid towed into orbit for that precise purpose. It could also be built on an airless low g moon. Both cheaper than the station and can leave a lot of room for expansion. Not to mention mining out the asteroid or moon to build the base may well generate an income from the metals dug out. If the asteroid is in a high orbit you may well not need station keeping engines, major savings.
My current visualization of shipyards are on low g airless moons where the ship is built on the surface (perhaps in an inflatable bubble to give air for the workers but not a actual structure to contain the ship.