Pilot/Controller Glossary SURPIC- A description of surface vessels in the area of a Search and Rescue incident including their predicted positions and their characteristics. (Refer to FAA Order JO 7110.65, Para 10-6-4, INFLIGHT CONTINGENCIES.) SURVEILLANCE APPROACH- An instrument approach wherein the air traffic controller issues instructions, for pilot compliance, based on aircraft position in relation to the final approach course (azimuth), and the distance (range) from the end of the runway as displayed on the controller"s radar scope. The controller will provide recommended altitudes on final approach if requested by the pilot. (Refer to AIM.) SURVEILLANCE ENHANCED SEARCH AND RESCUE (SE SAR)" An automated service used to enhance search and rescue operations that provides federal contract flight service specialists direct information from the aircraft"s registered tracking device. SUSPICIOUS UAS" Suspicious UAS operations may include operating without authorization, loitering in the vicinity of sensitive locations, (e.g., national security, law enforcement facilities, and critical infrastructure), or disrupting normal air traffic operations resulting in runway changes, ground stops, pilot evasive action, etc. The report of a UAS operation alone does not constitute suspicious activity. Development of a comprehensive list of suspicious activities is not possible due to the vast number of situations that could be considered suspicious. ATC must exercise sound judgment when identifying situations that could constitute or indicate a suspicious activity. SWAP- (See SEVERE WEATHER AVOIDANCE PLAN.) SWSL- (See SUPPLEMENTAL WEATHER SERVICE LOCATION.) SYSTEM STRATEGIC NAVIGATION- Military activity accomplished by navigating along a preplanned route using internal aircraft systems to maintain a desired track. This activity normally requires a lateral route width of 10 NM and altitude range of 1,000 feet to 6,000 feet AGL with some route segments that permit terrain following.