It will take you from one medical facility to another medical facility, if needed. Think of evacuation as medical transportation. If the medical facility where you are located cannot take care of your current medical needs this benefit will start working for you.
The key on how to get this benefit implemented/started is for your doctors, who are with you, to connect with the doctors at the insurance company. They can get the phone number(s) on your medical card/confirmation you receive once you purchase this policy. Then the doctors on both sides will make a determination on what is the best option.
If they need to evacuate you then the insurance company handles everything. There is no deductible or extra charges, besides your premium, for this benefit. In fact, you have up to 500,000USD no matter of the medical coverage you choose.
The key to using this evacuation cover, if and when needed, is to call the insurance company pronto and they will handle the rest. Keep in mind this is an evacuation medical transportation benefit and not a rescue benefit.