N CIRCUIT RUNWAY 25 LH ZONE TO AVOID AIRFIELD : EBUL - URSEL EFFECTIVE : 01/09/2019 TO REPORT OVERHEAD SIGNALSQUARE 1700ft AGL SIGNALSQUARE SSQ CIRCUIT Downwind speed 90 kts or higher CIRCUIT Downwind speed less than 90 kts ( ULM ) ATZ Ground - 2000 ft. ref.speed 130 km/u or less than 90 kts 1200 FT - AGL 1200 FT - AGL ref.speed 90 KTS or higher 25 07 799m SSQ ATZ Aalter-brug reportingpoint URSEL INFORMATION 135.130 MHz. GND-2000' Aalter-brug