Re: US Navy ship inquiry finished.....
Flipping coins has no place in navigating. If EITHER chart showed a possible problem, the captain would have been justified in going out of his way to avoid it. If you think there might be issues because of discrepancies on charts, you have people reading soundings and forward-sonar signals especially carefully, and have other people ready to react if anything - like a reef- is reported. Coral grows almost straight up from the bottom, so you need to be on your toes. I sailed transatlantic with an ex-Navy Destroyer captain who was assigned to search atolls in the Pacific for downed pilots at the end of WW II. He said the standing order was to proceed at flank speed on the given course to the next atoll, and when the depthsounder showed something like 2000 feet, to execute an immediate emergency full right rudder and stop engines. They'd be 500 feet from the island.