Hand signals, not radios
Frank, use your God-given signaling devices on the ends of your arms. Hand signals don't need batteries and you never misplace them. There are only a few actions that you'll need for any given situation. Forward Slow, Stop, Reverse, Go Right, Go Left, In Neutral. My wife and I have been anchoring and tying up to docks for almost 30 years and have a good system worked out. Make sure she knows what you are trying to do, what the goal is. Tying to a dock, come up to the dock at an angle, give it a shot of reverse to stop the boat about a foot off the dock. She STEPS OFF THE BOAT, no jumping, with a line in her hand, goes forward, and takes a turn around the first cleat that is forward of the bow, and stands by. You go onto the dock next, with a line in your hand, and take a turn on the first cleat that is aft of the stern. Your preplaced fenders take the load. all your lines and fenders are prerigged. We can anchor and pick up the anchor, tie to a dock and leave a dock without a word spoken. A little practice is all it takes.