When I was living in Ibiza back in 83, we used to listen to Capital after finishing work at 2am local time, it came in so clear, almost like it was local, no fading either, then would just disappear at daybreak.

It came in very well on The VOP as well in 78.
Crispian St. John also alluded to this earlier in an article he wrote when he first joined the ship.

Actually Caroline also came in very well on 963 of an evening there in '78 when they'd be running the 50.