Safety Margins
OM-A 1.4.5
The commander has the authority to apply greater safety margins, including enhanced airport operating minima, if he deems it necessary
OM-A 1.4.4 Emergency Situations
In emergency situations the commander may devaite from rules, applicable regulations, operational procedures and methods in the interest of safety
Good judgement and logic
Good judgement and logic
The last reason to land at the nearest suitable airport
have a significant adverse effect on safety if the flight is continued