{"schema_version":1,"airport":"Z98","entries":[{"cycle":"2026-02-19","from_cycle":"2026-01-22","id":"da3ad37f24ec","priority":"action","category":"remark","kind":"changed","summary":"remark updated: FOR CD CTC GREAT LAKES APCH AT 269-459-3344, WHEN APCH CLSD CTC CHICAGO ARTCC AT 630-906-8921.","source":"APT_RMK","original":"FOR CD CTC GREAT LAKES APCH AT 269-459-3344, WHEN APCH CLSD CTC CHICAGO ARTCC AT 630-906-8921.","fields":[{"field":"REMARK","old":"FOR CD CTC GREAT LAKES APCH AT 269-459-3345, WHEN APCH CLSD CTC CHICAGO ARTCC AT 630-906-8921.","new":"FOR CD CTC GREAT LAKES APCH AT 269-459-3344, WHEN APCH CLSD CTC CHICAGO ARTCC AT 630-906-8921."}]},{"cycle":"2026-02-19","from_cycle":"2026-01-22","id":"2b0745b65217","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: +16 FT ROAD, 125 FT DIST, 125 FT L/R; 8 FT SEASONAL CROPS.","source":"APT_RMK","original":"+16 FT ROAD, 125 FT DIST, 125 FT L/R; 8 FT SEASONAL CROPS.","fields":[{"field":"REMARK","old":"+16 FT ROAD, 125 FT FM THLD, 125 FT L/R & + 8 FT SEASONAL CROPS.","new":"+16 FT ROAD, 125 FT DIST, 125 FT L/R; 8 FT SEASONAL CROPS."}]},{"cycle":"2025-12-25","from_cycle":"2025-11-27","id":"b9607956b85d","priority":"action","category":"airport","kind":"changed","summary":"attended days: ALL -> MON-SAT","source":"APT_ATT","fields":[{"field":"DAY","old":"ALL","new":"MON-SAT"}]},{"cycle":"2025-12-25","from_cycle":"2025-11-27","id":"f8f80581cb75","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: +16 FT ROAD, 125 FT FM THLD, 125 FT L/R & + 8 FT SEASONAL CROPS.","source":"APT_RMK","original":"+16 FT ROAD, 125 FT FM THLD, 125 FT L/R & + 8 FT SEASONAL CROPS.","fields":[{"field":"REMARK","old":"+16 FT ROAD, 125 FT DIST; +8 FT CROPS DURG SUMMER MONTHS.","new":"+16 FT ROAD, 125 FT FM THLD, 125 FT L/R & + 8 FT SEASONAL CROPS."}]},{"cycle":"2025-12-25","from_cycle":"2025-11-27","id":"9fb81892f4c7","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: APCH RATIO 20:1 TO DTHR.","source":"APT_RMK","original":"APCH RATIO 20:1 TO DTHR.","fields":[{"field":"REMARK","old":"APCH RATIO 26:1 TO DTHR BASED ON +16 FT ROAD, 425 FT FM DTHR.","new":"APCH RATIO 20:1 TO DTHR."}]},{"cycle":"2025-12-25","from_cycle":"2025-11-27","id":"8fa910c0c122","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: RWY SLPS UP FM SOUTH TO NORTH.","source":"APT_RMK","original":"RWY SLPS UP FM SOUTH TO NORTH.","fields":[{"field":"REMARK","old":"RWY SLOPES UP FM SOUTH TO NORTH.","new":"RWY SLPS UP FM SOUTH TO NORTH."}]},{"cycle":"2025-12-25","from_cycle":"2025-11-27","id":"f9798279281d","priority":"fyi","category":"runway","kind":"changed","summary":"runway 02: controlling obstacle changed (now , clearance slope 20:1)","source":"APT_RWY_END","fields":[{"field":"OBSTN_CLNC_SLOPE","old":"50","new":"20"}]},{"cycle":"2025-06-12","from_cycle":"2025-05-15","id":"044c2d30c507","priority":"action","category":"remark","kind":"changed","summary":"remark updated: APCH/DEP SVC PRVDD BY CHICAGO ARTCC ON FREQS 128.4/257.6 (GRAND RAPIDS  RCAG) WHEN GREAT LAKES APCH CTL CLSD.","source":"ATC_RMK","original":"APCH/DEP SVC PRVDD BY CHICAGO ARTCC ON FREQS 128.4/257.6 (GRAND RAPIDS  RCAG) WHEN GREAT LAKES APCH CTL CLSD.","fields":[{"field":"REMARK","old":"APCH/DEP SVC PRVDD BY CHICAGO ARTCC ON FREQS 128.4 (GRAND RAPIDS  RCAG) WHEN GREAT LAKES APCH CTL CLSD.","new":"APCH/DEP SVC PRVDD BY CHICAGO ARTCC ON FREQS 128.4/257.6 (GRAND RAPIDS  RCAG) WHEN GREAT LAKES APCH CTL CLSD."}]},{"cycle":"2025-05-15","from_cycle":"2025-04-17","id":"674ae6669cfb","priority":"action","category":"tower","kind":"changed","summary":"approach/departure control now provided by AZO (was ); approach/departure control: none -> GREAT LAKES (AZO, airport with ATCT); secondary approach/departure control: none -> CHICAGO ARTCC (ZAU)","source":"ATC_BASE","fields":[{"field":"APCH_P_PROVIDER","old":"","new":"AZO"},{"field":"APCH_P_PROV_TYPE_CD","old":"","new":"A"},{"field":"APCH_S_PROVIDER","old":"","new":"ZAU"},{"field":"APCH_S_PROV_TYPE_CD","old":"","new":"C"},{"field":"DEP_P_PROVIDER","old":"","new":"AZO"},{"field":"DEP_P_PROV_TYPE_CD","old":"","new":"A"},{"field":"DEP_S_PROVIDER","old":"","new":"ZAU"},{"field":"DEP_S_PROV_TYPE_CD","old":"","new":"C"},{"field":"PRIMARY_APCH_RADIO_CALL","old":"","new":"GREAT LAKES"},{"field":"PRIMARY_DEP_RADIO_CALL","old":"","new":"GREAT LAKES"},{"field":"SECONDARY_APCH_RADIO_CALL","old":"","new":"CHICAGO ARTCC"},{"field":"SECONDARY_DEP_RADIO_CALL","old":"","new":"CHICAGO ARTCC"}]},{"cycle":"2025-05-15","from_cycle":"2025-04-17","id":"158739042220","priority":"action","category":"frequency","kind":"changed","summary":"approach control radio call: none -> GREAT LAKES","source":"FRQ","fields":[{"field":"PRIMARY_APPROACH_RADIO_CALL","old":"","new":"GREAT LAKES"}]},{"cycle":"2025-05-15","from_cycle":"2025-04-17","id":"aa9fd680c92a","priority":"action","category":"remark","kind":"changed","summary":"remark updated: APCH/DEP SVC PRVDD BY CHICAGO ARTCC ON FREQS 128.4 (GRAND RAPIDS  RCAG) WHEN GREAT LAKES APCH CTL CLSD.","source":"ATC_RMK","original":"APCH/DEP SVC PRVDD BY CHICAGO ARTCC ON FREQS 128.4 (GRAND RAPIDS  RCAG) WHEN GREAT LAKES APCH CTL CLSD.","fields":[{"field":"REMARK","old":"APCH/DEP SVC PRVDD BY CHICAGO ARTCC ON FREQS 128.5/273.525 (PULLMAN RCAG) WHEN GREAT LAKES APCH CTL CLSD.","new":"APCH/DEP SVC PRVDD BY CHICAGO ARTCC ON FREQS 128.4 (GRAND RAPIDS  RCAG) WHEN GREAT LAKES APCH CTL CLSD."}]},{"cycle":"2025-05-15","from_cycle":"2025-04-17","id":"cfca3f3c1f68","priority":"fyi","category":"frequency","kind":"added","summary":"frequency 128.4 now also listed for APCH/P DEP/P","source":"FRQ"},{"cycle":"2025-05-15","from_cycle":"2025-04-17","id":"d0943fd73abb","priority":"fyi","category":"frequency","kind":"added","summary":"frequency 257.6 now also listed for APCH/P DEP/P","source":"FRQ"},{"cycle":"2025-04-17","from_cycle":"2025-03-20","id":"b77d1c04a8ea","priority":"fyi","category":"tower","kind":"added","summary":"new ATC facility entry, non-towered (it names no tower or approach control)","source":"ATC_BASE","fields":[{"field":"FACILITY_TYPE","old":"","new":"NON-ATCT"},{"field":"FACILITY_ID","old":"","new":"Z98"},{"field":"FACILITY_NAME","old":"","new":"OTTAWA EXEC"},{"field":"REGION_CODE","old":"","new":"AGL"}]},{"cycle":"2025-04-17","from_cycle":"2025-03-20","id":"cb1af950cb6a","priority":"action","category":"frequency","kind":"added","summary":"frequency 128.4 (GRAND RAPIDS RCAG) added","source":"FRQ"},{"cycle":"2025-04-17","from_cycle":"2025-03-20","id":"cfb50457d065","priority":"action","category":"frequency","kind":"added","summary":"frequency 257.6 (GRAND RAPIDS RCAG) added","source":"FRQ"},{"cycle":"2025-04-17","from_cycle":"2025-03-20","id":"b93b445a43f6","priority":"action","category":"remark","kind":"added","summary":"new remark: APCH/DEP SVC PRVDD BY CHICAGO ARTCC ON FREQS 128.5/273.525 (PULLMAN RCAG) WHEN GREAT LAKES APCH CTL CLSD.","source":"ATC_RMK","original":"APCH/DEP SVC PRVDD BY CHICAGO ARTCC ON FREQS 128.5/273.525 (PULLMAN RCAG) WHEN GREAT LAKES APCH CTL CLSD."}],"first_cycle":"2025-04-17","last_cycle":"2026-02-19"}