During the scene where the tsunami capsizes the ship is a bit farfetched. First, tsunamis in deep water have heights of less than a meter-hardly anything that a captain would notice on radar much less capsize a boat, tsunamis only become dangerous as it approaches shallow coastal waters, where it piles up into a wave many meters high. Second, tsunamis travel much faster than 60 knots. Unless the Poseidon had been very close to shore, the captain would have been hard put to have even noticed the tsunami.