Factual error: In the rescue scene where the Coast Guard Cutter Tamaroa is picking up the downed helicopter crew, the Tamaroa is shown as a modern day cutter. The real Tamaroa is an old ship, which is about to be decommissioned. The real Tamaroa and the one shown in the movie are nothing alike. While the ships only differ by 5 feet (Tamaroa was 205' and the other 210'), the differences are more substantial because Tamaroa was built with a substantially lower center of gravity, which helped Tamoroa remain upright during the storm despite rolls of 55° in each direction (110°). The other cutter would likely have never have survived that storm.
Factual error: The rough wave is going the wrong way. When they left the eye and entered the "Eye Wall" (the most powerful part of hurricanes), they suddenly meet that massive rogue. The problem is, the powerful rotating Eye Wall's forces push massive waves AWAY from the rotating center. The rogue in the movie was headed toward the hurricane's center, but the Eye Wall would have broken it down, demolished it and sucked into the rotating momentum of hurricane. It never happened.