There's an ethernet port on the router. I cable my laptop to the router and use the WiFi on the WAN side of the router to connect to the ship.
Alternatively, if your router has a "clone MAC address" function, you can connect with your computer, then clone your wireless adapter MAC address. The ship will "see" the router as your computer. (I didn’t mention that method because it's a little more complicated.)
If you don't have a guest mode (user ID and password) on your home internet, you can take your computer and router to any local business that offers UID / pass guest internet and set it up there.