The extention cable used on this homemade job is an "active" cable. No losses with this. If you build one, be sure to get the "active" and not a "passive", or you will experience some loss. I went with this system because it uses an omni-directional antenna. I was thinking this should work well swinging on the anchor or mooring ball. I wouldn't think a directional antenna would work too well out there.
By the way, XORT, excuse my ignorance, but what the hell is a "stuffer slappy"?
The new ship here is fitted according to the reported increase of knowledge among mankind. Namely, she is cumbered end to end with bells & trumpets & clock & wires, it has been told me, can call voices out of the air of the waters to con the ship while the crew sleeps. But sleep thou lightly, it has not yet been told me that the Sea has ceased to be the Sea. Rudyard Kipling