The power is at the fixture location, the remote will not be close to any wires.Old-school X-10 PLC (power line carrier) technology that uses the wires rather than RF.
The boat it will be lighting is on the upward side of a mil so that is probably a number that would be considered.I have wireless we use on wells and pivots but they are pricey and require some additional tinkering. $1000 give or take. 5 miles IIRC.
Thank you Eric, I'll look into themWe use BWI Eagle for a remote switching application in a paper mill machine room. We aren't using them at the range you are looking for but the ones we use are supposed to be good for up to 600 feet with a particular transmitter. I have no idea what they cost.
WiFi might be the way to go then, cameras and other goodies could be added. I did one last year, but buried an extra conduit for Ethernet to the dock, then a wireless switch at the pedestal. I have wireless to my gate camera and controls, and I have a range of over 100 yards @ 360 degrees. I have another one that does line of site up to 10 miles, it’s shooting at around two tenths of a mile right now. If I can get an agreement with the local isp that has fiber 1/2 a mile away, I willl be moving it. 100 meg vs 3. Not bad expensive.The boat it will be lighting is on the upward side of a mil so that is probably a number that would be considered.
Roger