Borr Drilling's Prospector 5 jack-up rig has sunk offshore Gabon after experiencing a punch-through event during preload operations that caused it to lose stability, leaving five people missing and 110 safely accounted for among the 115 personnel on board.In its latest update on October 26, Borr Drilling said extensive marine and air search and rescue operations were continuing for the five missing individuals, while the 110 personnel accounted for were being brought ashore in Gabon…