Ambulance (SCAA) was formed in 2012 and launched a helicopter air ambulance in May 2013 to assist the Scottish Air Ambulance Service (SAAS) to deliver front-line care to time-critical emergencies across Scotland. SCAA provides a fully equipped medical helicopter that can be deployed from its central base at Perth Airport to incidents across the length and breadth of Scotland. In February 2019, the airport was reported to be looking into the possibility of attracting low-cost carriers such as Easyjet and Ryanair for scheduled passenger flights, though ACS Aviation subsequently denied having any such plans. Perth does not have the approach procedures required and its longest runway, at in length, is not long enough to accommodate commercial jet aircraft, which typically require a minimum of 1700m in order to land and take off. Runways The airport's runways are: Due to the airport's terrain, aircraft on the threshold of runway 21 are out of sight to aircraft on runway 09/27. Lighting The airport is licensed for night take-offs and landings on runway 03/21. Out-of-hours airport use is strictly Prior Permission Required (PPR). The lighting is to scale L4 and includes: Variable Intensity Precision Approach Path Indicator lighting (VI PAPI) Variable Intensity runway edge (white), threshold (green) and end (red) lighting Taxiway Bravo exiting towards the start/end of runway 09 has fixed green taxiway centreline lighting Stopway lighting Obstacle lighting There is no approach lighting or aerodrome beacon. Pilot-operated lighting is available for out-of-hours use. Five clicks within five seconds on frequency 119.80 turns on the PAPI lights for ten minutes. An additional five clicks resets the timer to zero. This feature is not available for taxiway lights. Standard operating procedures The Aerodrome Traffic Zone (ATZ) is notified active 0900 – 1700z in winter, 0800 – 1600Z in summer, and at other times by NOTAM. Perth Radio (119.80 MHz) is usually manned when the ATZ is active. Its communications are air/ground; it does not give instructions or clearances. Obstacles There is a line of hills running northeast–southwest to the east and south of the airport at a distance of 1.5 nm at its closest point. There are two significant peaks – Kingseat, 839 feet Above Aerodrome Elevation (AAL) (1236 feet Above Mean Sea Level (AMSL)), range 5 nm, bearing 058 degrees; and Murrayshall Hill, 521 feet AAL (918 feet AMSL), range , bearing 160 degrees. There are the following obstacles relative to the