{"schema_version":1,"airport":"BIF","entries":[{"cycle":"2025-09-04","from_cycle":"2025-08-07","id":"7251d1ba39da","priority":"action","category":"frequency","kind":"removed","summary":"frequency 121.3 (DEP/P) removed","source":"FRQ"},{"cycle":"2025-09-04","from_cycle":"2025-08-07","id":"ddbc0e2d596f","priority":"action","category":"frequency","kind":"removed","summary":"frequency 263.0 (DEP/P) removed","source":"FRQ"},{"cycle":"2025-09-04","from_cycle":"2025-08-07","id":"6c29e44bd3df","priority":"fyi","category":"frequency","kind":"added","summary":"frequency 124.25 now also listed for DEP/P","source":"FRQ"},{"cycle":"2025-09-04","from_cycle":"2025-08-07","id":"512f88dc2652","priority":"fyi","category":"frequency","kind":"added","summary":"frequency 298.85 now also listed for DEP/P","source":"FRQ"},{"cycle":"2025-06-12","from_cycle":"2025-05-15","id":"a9b87a4b453a","priority":"action","category":"tower","kind":"changed","summary":"tower hours changed: 1500-0700Z++ MON-SUN. -> OPEN 24 HRS. local","source":"ATC_BASE","fields":[{"field":"TWR_HRS","old":"1500-0700Z++ MON-SUN.","new":"OPEN 24 HRS."}]},{"cycle":"2025-06-12","from_cycle":"2025-05-15","id":"ef146f14d780","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: AFLD OPS OPR 1500-0700Z++ MON-SUN, EXC HOL.","source":"APT_RMK","original":"AFLD OPS OPR 1500-0700Z++ MON-SUN, EXC HOL.","fields":[{"field":"REMARK","old":"TRAN ALERT - 1300-0700Z++ MON-FRI, 1500-0700Z++ SAT & SUN, EXC HOL.","new":"AFLD OPS OPR 1500-0700Z++ MON-SUN, EXC HOL."}]},{"cycle":"2025-06-12","from_cycle":"2025-05-15","id":"4dd924eac73d","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: RSTD: PPR ALL ACFT 24 HR PN RQRD, CTC AIRFIELD OPS DSN 621-8811/8330, C915-744-8811/8330. TWR AND SVCS AVBL FOR ALL ACFT WITH PPR. PPR TIME VALID +/-1 HR. ALL ACFT CTC AFLD OPNS VIA PTD 30 MIN PRIOR TO ARR. FLT OPS AND TRAN ALERT SVC UNAVBL BFR 1 HR PRIOR TO PPR SKED ARR.","source":"APT_RMK","original":"RSTD: PPR ALL ACFT 24 HR PN RQRD, CTC AIRFIELD OPS DSN 621-8811/8330, C915-744-8811/8330. TWR AND SVCS AVBL FOR ALL ACFT WITH PPR. PPR TIME VALID +/-1 HR. ALL ACFT CTC AFLD OPNS VIA PTD 30 MIN PRIOR TO ARR. FLT OPS AND TRAN ALERT SVC UNAVBL BFR 1 HR PRIOR TO PPR SKED ARR.","fields":[{"field":"REMARK","old":"RSTD: PPR ALL ACFT 24 HR PN CTC AIRFIELD OPS DSN 621-8811/8330, C915-744-8811/8330. TWR AND SVCS AVBL FOR ALL ACFT WITH PPR. PPR TIME VALID +/-1 HR. ALL ACFT CTC AFLD OPNS VIA PTD 30 MIN PRIOR TO ARR. FLT OPS AND TRAN ALERT SVC UNAVBL BFR 1 HR PRIOR TO PPR SKED ARR.","new":"RSTD: PPR ALL ACFT 24 HR PN RQRD, CTC AIRFIELD OPS DSN 621-8811/8330, C915-744-8811/8330. TWR AND SVCS AVBL FOR ALL ACFT WITH PPR. PPR TIME VALID +/-1 HR. ALL ACFT CTC AFLD OPNS VIA PTD 30 MIN PRIOR TO ARR. FLT OPS AND TRAN ALERT SVC UNAVBL BFR 1 HR PRIOR TO PPR SKED ARR."}]},{"cycle":"2024-09-05","from_cycle":"2024-08-08","id":"c24f5e90ad09","priority":"fyi","category":"remark","kind":"added","summary":"new remark: William Beaumont Hospital Helipad common traffic advisory frequency is 126.2.","source":"APT_RMK","original":"WILLIAM BEAUMONT HOSPITAL HELIPAD PCL FREQ 126.2."}],"first_cycle":"2024-09-05","last_cycle":"2025-09-04"}