A while ago now, when out on the boat, we used to access broadband by putting a dongle inside an CB aerial coil with a magnetic base. See pictures. The dongle had a sim card in it, the other end had a usb connection which plugged into a laptop.
Due to advances in telecommunication this no longer works.
I have been doing research and all the external aerials I can find require plugging into a router. We don't want that as we only want access to a laptop. The free WiFi reception in the marina where we moor is poor. If too many are accessing it the connection it frequently drops out.
Does anyone have a dongle/aerial solution for occasional use, which does what we want?
Thank you.
ETA we've tried internal aerials but being inside the boat, again reception is poor. We either have to sit in the cratch or in the hatches which is not always convenient.