A location type deemed by carriers to have an increased level of difficulty. Reasons may include but are not limited to: security, dangerous conditions, additional paperwork requirements, space available for navigation, or non-commercial without a dock.
Some common examples include storage facility/unit, farms, camps, religious institutions, militiary bases, trade shows, schools, universities, port, marinas, prisons, government facilities, hotels, golf courses, car dealerships, etc.
Limited access costs vary by carrier.