From https://www.offshoreradio.co.uk/odds32.htm
The more complete story of Blackburn's brave climb & repair to the Mi Amigo's mast.

Speaking some years later to interviewer Ray Clark, Tony Prince remembers: “There was something right at the top of the mast that had come askew and it was stopping us from broadcasting. (There was) a force 12 and we wouldn't get the tender out with the engineer on. So we were all sitting on the ship playing cards, bored like crazy, thinking what can we do. Norman St.John said ‘let's get up this bloody mast and get back on air’ and we agreed like the cavalry, ‘we can do this thing captain’ so Norman with the mouth went up first - and did about 10 rungs and came back down. It was very cold. So God bless Tony Blackburn, he had a go. He went about half way and he came back, hands freezing, so then I had a go. You put this safety harness on with a clip and I went up and I realised why Tony had come down at that point. You got to a point on the mast where the new section has been welded on. The rungs from that point were thicker and the little clip on the safety belt wouldn't clip over the rungs. So the worst part of the journey up, was the most dangerous, because you wouldn't have your safety harness. So I went a few rungs and I was like jelly, looking down at the sea and swaying from side to side, hands were freezing and I was going to drop off there any minute. I thought no, I'm not going to be a hero today and I came back down. By that time Blackburn had got his courage up again and he decided to have another go. He went all the way. I'll never know how he got the courage to do it. We often talk about it, Tony and I, but it was a very heroic thing from an anorak DJ to want the ship back on air passionately enough to do that. He climbed right to the top and got the rogue wire, let it come down. It didn't come down all the way, he was too tired to get it when he got it halfway down. Then I went back up and got the rogue wire from the point where it had got stuck again and just at that point (station boss) Ronan O'Rahilly and the engineer had come out in the tender and there was all kinds of yelling going on, telling the tender not to come along side in case it banged the ship and knocked the ‘Royal Ruler’ (me) off the mast.”