A normal reconnaissance flight is about 1700 nm long and lasts about 7 hours. As defined by U.S. law and by International treaty, Ice Patrol's responsibilities involve patrolling the limits of all known ice south of 48 N. Therefore, IIP's reconnaissance flights focus on these areas. IIP conducts reconnaissance flights at 6000-8000 feet with a 30 nm track spacing. While using Forward Looking Airborne Radar (FLAR) and Side Looking Airborne Radar (SLAR)(see FAQ 25), IIP flights allow for 200% coverage of the interior portion of a standard parallel track search pattern as shown below. Typically, it takes about four flight days to cover the limits of all known ice.