I have 5 M4 units in the house; actually 4 in the house and 1 in the separate garage. They all work well and my WiFi network is quite expansive even outdoors. However, our property is on a river and while I do have some signal at the dock it is weak. I would like to connect to my mesh network with an outdoor unit to provide a strong signal on the dock.  Most outdoor access points require connecting to the main router via a cable which makes no sense to me if my M4 satellite in the garage connects to my network wirelessly...Is there an outdoor unit that would do this? It would obviously require power so an outlet and that is doable.

Thanks