Tom Brosz said:
"The natural changes in air density from temperature changes are well known by pilots and taken into account.

Yes and the ship captain takes the water level into consideration also, but neither the pilot or the captain need to know ALL the reasons why the condition exists. All they need to do is trust the people that made the instruments that indicate the pertinent information.

You on the other hand trust a person who had not collected any information from any instrument.
He simply says that the reef does not exist and the air pressure will not decrease because he knows how to use a calculator.