In practice, their usefulness is heavily constrained by timing. They generally must be purchased shortly after the initial trip payment, and they do not override the industry concept of a “foreseeable event”. Once a conflict, airspace closure or government advisory is widely publicised, it is usually treated as foreseeable, meaning it cannot be used as the trigger for new cover, and travelers who did not already have CFAR or IFAR in place will find themselves limited to the narrower list of named perils.
