If the No1 becomes incapacitated before departure, what is the first action?

The first action to take if the No1 becomes incapacitated before departure is to have the No3 step up and assume the responsibilities of No1, provided that they are qualified to do so. This is crucial for ensuring that the flight operation remains within regulatory safety standards and that there is a qualified pilot in command. The hierarchy and roles of the flight crew are designed to allow for seamless transitions in such situations, and having a qualified individual take over helps maintain control and assurance during pre-flight procedures.

It is essential for crew members to be familiar with each other's qualifications and training, allowing for an efficient response to such unforeseen circumstances. This systematic approach ensures that safety protocols are upheld, and decision-making can continue effectively without significant disruption to the flight schedule or safety of the passengers on board.