{"schema_version":1,"airport":"OYM","entries":[{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"f0e5e0fc63bc","priority":"fyi","category":"frequency","kind":"removed","summary":"flight service (FSS) 122.4 via the St Marys outlet no longer available","source":"FRQ"},{"cycle":"2025-12-25","from_cycle":"2025-11-27","id":"0b655a0e565c","priority":"fyi","category":"runway","kind":"changed","summary":"runway 10: controlling obstacle changed (now 142 ft tall, 3684 ft from threshold, 340 ft left of centerline, clearance slope 24:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"565","new":"340"},{"field":"DIST_FROM_THR","old":"2354","new":"3684"},{"field":"OBSTN_CLNC_SLOPE","old":"29","new":"24"},{"field":"OBSTN_HGT","old":"73","new":"142"}]},{"cycle":"2025-12-25","from_cycle":"2025-11-27","id":"2bd7c9185cf2","priority":"fyi","category":"runway","kind":"changed","summary":"runway 28: controlling obstacle changed (now 72 ft tall, 2372 ft from threshold, 523 ft left of centerline, clearance slope 30:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"345","new":"523"},{"field":"DIST_FROM_THR","old":"3734","new":"2372"},{"field":"OBSTN_CLNC_SLOPE","old":"24","new":"30"},{"field":"OBSTN_HGT","old":"142","new":"72"}]},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"7fff3058c1ac","priority":"fyi","category":"runway","kind":"changed","summary":"runway 10: controlling obstacle changed (now 73 ft tall, 2354 ft from threshold, 565 ft left of centerline, clearance slope 29:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"490","new":"565"},{"field":"DIST_FROM_THR","old":"2358","new":"2354"},{"field":"OBSTN_HGT","old":"74","new":"73"}]},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"0fe7e5520a33","priority":"fyi","category":"runway","kind":"changed","summary":"runway 28: controlling obstacle changed (now 142 ft tall, 3734 ft from threshold, 345 ft left of centerline, clearance slope 24:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"244","new":"345"},{"field":"DIST_FROM_THR","old":"670","new":"3734"},{"field":"OBSTN_CLNC_SLOPE","old":"15","new":"24"},{"field":"OBSTN_HGT","old":"31","new":"142"}]}],"first_cycle":"2024-12-26","last_cycle":"2026-09-03"}