There were 2 irregularities on Rodney's run. E19 to C18 is 3 sectors not 2 A5 to C3 is 3 sectors not 2 At the end of the run Rodney had 2 movement points but only needed 1, so the run ended up being 1 more turn than posted. HMS Rodney finished in 24 turns, which is 4 hours.
T1 Landing Ship has a discrepancy. D3, B4 is 3 moves not 2 T1 Landing Ship had exactly the right number of moves to finish, so it would need another turn to cross the line and finishes in 25 moves or 4 hours, 10 minutes.
Nagato has a discrepancy. => C4 => A5 is 2 moves, not 1 As Nagato reached the finish line with the exact number of moves available, Nagato finishes in 26 turns or 4 hours, 20 minutes.