Rupert Murdoch was lying on the floor of his cabin, unable to move. It was January 2018, and Murdoch and his fourth wife, Jerry Hall, were spending the holidays cruising the Caribbean on his elder son Lachlan’s yacht. Lachlan had personally overseen the design of the 140-foot sloop — named Sarissa after a long and especially dangerous spear used by the armies of ancient Macedonia — ensuring that it would be suitable for family vacations while also remaining competitive in superyacht regattas. The cockpit could be transformed into a swimming pool. The ceiling in the children’s cabin became...…Rupert Murdoch was lying on the floor of his cabin, unable to move. It was January 2018, and Murdoch and his fourth wife, Jerry Hall, were spending the holidays cruising the Caribbean on his elder son Lachlan’s yacht. Lachlan had personally overseen the design of the 140-foot sloop — named Sarissa after a long and especially dangerous spear used by the armies of ancient Macedonia — ensuring that it would be suitable for family vacations while also remaining competitive in superyacht regattas. The cockpit could be transformed into a swimming pool. The ceiling in the children’s cabin became...WW…