Has any harbour ever offered shore-power to swinging moorings?

[maxi77]

Certainly in the mid to late 1980s there was a large, round, yellow buoy with a flashing yellow light on top, the sort you could stand on - buoy, not light, as opposed to the yellow barrel types. On the pole with the light there was a large box which looked as if it could be a junction box. I am aware of one grey ship and one submarine faffing about with the buoy and men in a rib, on the buoy. The buoy is now gone, I am sure and was replaced with a black barrel type, which might also be gone now. The pace of life on the Clyde is very sedentary now.

That I think started life as HMS Forth's mooring and certainly did have more than one phone connection though I do not think there was any shore power. That would indicate that the problem of connecting a cable from the land to a rotating buoy was solved in the mid part of the last century. As for standing on buoys the RN's barrelly type buoys could be stood on, old O & P class boats used to get one lucky lad to jump from the bow of the boat onto the buoy to secure the picking up rope and ship to buoy shackle. The lad strangely enough was known as the 'buoy jumper'.