Corrected entry: Hopper has the rank of Lieutenant when he is promoted to Lieutenant Commander at the end of the movie. Promotion to Lieutenant Commander can only be achieved after minimum 9 years of service as a officer and 3 years as a Lieutenant described in US Department of Defense DOPMA act from 1980. However Hopper was a civilian 6 years before the action took place and he has the "Enlisted Surface Warfare" badge that shows that he has been an enlisted and probably gone to OCS (Officer Candiate School) at some time to become a officer and given navy regulations he has likely just been promoted to Lieutenant and likely has been a officer for about 4-5 years. There is now way he can be promotet to Lieutenant Commander under military and DOD regulations since he barely can be a Lieutenant.
Corrected entry: When Hopper is being chased by the alien and he goes on deck, Rihanna goes into the control room and aims the cannon at the alien's head. Just before she fires she says "Mahalo" which is thanks in Hawaiian. It would have been better to say "Aloha", which is Hawaiian for hello and goodbye, just before she fires the cannon.
Corrected entry: Alex Hopper's brother receives posthumously a Navy Cross (2nd highest award) for attacking the aliens, but Alex Hopper only receives a Silver Star (3rd highest award) for saving the world?
Corrected entry: Lieutenant Hopper is called a Lieutenant Commander (one rank higher) at the end of the movie when he receives an award.
Corrected entry: During the movie Rihanna was playing the role of an Fire Controlman [FC], but at the very end, when she is in her dress whites her rank insignia shows her being a Yeoman [YN]. Yeomen perform secretarial and clerical work, even during battle, they would most likely be, a phone-talker on the bridge, or a messenger for a damage control party, maybe even a status board writer in the combat information center [CIC]. So her being in the CIC controlling the guns is directly contradictory to her rate as a YN2.
Corrected entry: When Alex Hopper is being tazed he hands the chicken burrito over. His hand touches hers as she takes it. If she touched him while being tazed she would've been shocked too.
Corrected entry: Instead of blowing up an entire mountaintop communication facility, why didn't the military just destroy the Landsat 7 satellite? Either command it to self-destruct by burning up on an atmospheric re-entry or destroy it with anti-satellite weapons that already exist. Or just simply command the satellite to power-down.
Corrected entry: The physio leaves at 9am to take the amputee soldier on a hike, shortly afterwards the alien ships hit Hong Kong and Hawaii, but it's daylight in both places. It would be approx 3am the following day in Hong Kong.
Corrected entry: A satellite which has been designed by NASA to be as light as possible can damage one of the alien spacecraft in such a way that it becomes steer-less, crashes and burns. But the other four are perfectly undamaged while they smashed into water. Water has a relatively high surface tension. So when a satellite can damage a ship that badly, there is no way they would survive such a crash into the ocean.
Corrected entry: The alien ships could not be seen by RADAR when in the ocean. However they were able to be tracked when in space coming towards Earth.