Core Points - The article emphasizes the importance of arriving at the airport early for check-in, especially during busy travel periods like national holidays, with recommendations of 2 to 3 hours in advance for domestic and international flights respectively [1][2] - It highlights that missing the check-in deadline can lead to strict enforcement of boarding rules, as the preparation for a flight requires confirmed passenger and luggage counts [2][4] Group 1: Importance of Check-in and Boarding Procedures - Airlines advise passengers to check in early to ensure all necessary preparations, including the creation of the flight manifest, are completed on time [3][4] - The flight manifest is crucial for flight safety, as it allows for the calculation of weight distribution and balance, which must be finalized before boarding closes [3][5] Group 2: Weight and Balance Considerations - The article discusses the critical role of weight balance and center of gravity in flight safety, citing that 77% of flight accidents are related to improper weight distribution [6] - Historical incidents, such as the China Northern Airlines Flight 6136 and the National Airlines Flight 102, illustrate the severe consequences of weight mismanagement [6] Group 3: Last Minute Adjustments - The concept of "last minute changes" allows for minor adjustments to the flight manifest without needing a complete re-calculation of weight balance, provided the changes are within specified limits [17][18] - These adjustments can include changes in passenger numbers or cargo weight, but significant alterations still require a full re-evaluation of the flight manifest [18] Group 4: Passenger Responsibilities - Passengers are reminded to be punctual and attentive to boarding announcements, as delays can affect the entire flight schedule [19] - The article stresses that timely arrival at the airport and adherence to boarding times is not only beneficial for individual travelers but also respectful to fellow passengers and crew [19]