http://www.caas.gov.sg/caasWeb2010/export/sites/caas/en/ANS/aero-modelling.html
Within 5km of an airport or airbase
Higher than 200 feet above mean sea level outside 5km of an airport or airbase
Categories
http://www.caas.gov.sg/caasWeb2010/export/sites/caas/en/ANS/aero-modelling.html
Within 5km of an airport or airbase
Higher than 200 feet above mean sea level outside 5km of an airport or airbase