{"schema_version":1,"airport":"BZN","entries":[{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"a96faa33d69b","priority":"action","category":"remark","kind":"removed","summary":"remark removed: COMMUNICATIONS PRVDD BY GREAT FALLS RADIO ON FREQ 122.5 (BOZEMAN RCO).","source":"ATC_RMK","original":"COMMUNICATIONS PRVDD BY GREAT FALLS RADIO ON FREQ 122.5 (BOZEMAN RCO)."},{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"4672f2db2643","priority":"action","category":"remark","kind":"changed","summary":"remark updated: FOR CD WHEN ATCT CLSD CTC SALT LAKE ARTCC AT 801-320-2568.","source":"APT_RMK","original":"FOR CD WHEN ATCT CLSD CTC SALT LAKE ARTCC AT 801-320-2568.","fields":[{"field":"REMARK","old":"FOR CD WHEN ATCT CLSD CTC BIG SKY APCH AT 208-364-5860, WHEN ATCT AND APCH CLSD CTC SALT LAKE ARTCC AT 801-320-2568.","new":"FOR CD WHEN ATCT CLSD CTC SALT LAKE ARTCC AT 801-320-2568."}]},{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"2e064e73dfbb","priority":"fyi","category":"frequency","kind":"removed","summary":"flight service (FSS) 122.5 via the Bozeman outlet no longer available","source":"FRQ"},{"cycle":"2026-03-19","from_cycle":"2026-02-19","id":"61d9f26ad055","priority":"fyi","category":"navaid","kind":"changed","summary":"runway 12: remark: ILS CLASSIFICATION CODE IID. -> ILS CLASSIFICATION CODE IIE.","source":"ILS_RMK","fields":[{"field":"REMARK","old":"ILS CLASSIFICATION CODE IID.","new":"ILS CLASSIFICATION CODE IIE."}]},{"cycle":"2026-01-22","from_cycle":"2025-12-25","id":"b60047ae24aa","priority":"action","category":"navaid","kind":"changed","summary":"runway 12: approach bearing: 122.76 -> 122.75° magnetic; ILS category: I -> II","source":"ILS_BASE","fields":[{"field":"APCH_BEAR","old":"122.76","new":"122.75"},{"field":"CATEGORY","old":"I","new":"II"}]},{"cycle":"2026-01-22","from_cycle":"2025-12-25","id":"8b17c6ae7158","priority":"action","category":"runway","kind":"changed","summary":"runway 30: approach lights: none -> 1,400 foot medium intensity approach lighting system with runway alignment indicator lights (MALSR); runway end identifier lights (REIL): yes -> no; RVR equipment: none -> touchdown, midfield, rollout (TMR); threshold crossing height: 45 -> 50 ft AGL; visual glide path angle: 3 -> 3.2°","source":"APT_RWY_END","fields":[{"field":"APCH_LGT_SYSTEM_CODE","old":"","new":"MALSR"},{"field":"RWY_END_LGTS_FLAG","old":"Y","new":"N"},{"field":"RWY_VISUAL_RANGE_EQUIP_CODE","old":"","new":"TMR"},{"field":"THR_CROSSING_HGT","old":"45","new":"50"},{"field":"VISUAL_GLIDE_PATH_ANGLE","old":"3","new":"3.2"}]},{"cycle":"2026-01-22","from_cycle":"2025-12-25","id":"b7fc52b8b226","priority":"ifr","category":"procedure","kind":"changed","summary":"arrival/departure procedures new or updated: POWDA2","source":"STAR/DP","procedures":{"updated":["POWDA2"],"removed":[]}},{"cycle":"2026-01-22","from_cycle":"2025-12-25","id":"2097763f2863","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: WHEN ATCT CLSD ACTVT MALSR RWY 12 & 30; HIRL RWY 12/30; MIRL RWY 11/29 - CTAF. PAPI RWY 12 & 30 OPR CONSLY.","source":"APT_RMK","original":"WHEN ATCT CLSD ACTVT MALSR RWY 12 & 30; HIRL RWY 12/30; MIRL RWY 11/29 - CTAF. PAPI RWY 12 & 30 OPR CONSLY.","fields":[{"field":"REMARK","old":"WHEN ATCT CLSD ACTVT MALSR RWY 12; REIL RWY 30; HIRL RWY 12/30; MIRL RWY 11/29 - CTAF. PAPI RWY 12 & 30 OPR CONSLY.","new":"WHEN ATCT CLSD ACTVT MALSR RWY 12 & 30; HIRL RWY 12/30; MIRL RWY 11/29 - CTAF. PAPI RWY 12 & 30 OPR CONSLY."}]},{"cycle":"2026-01-22","from_cycle":"2025-12-25","id":"70045d164df9","priority":"fyi","category":"frequency","kind":"changed","summary":"remark: WHEN ATCT CLSD ACTVT MALSR RWY 12; REIL RWY 30; HIRL RWY 12/30; MIRL RWY 11/29 - CTAF. PAPI RWY 12 & 30 OPR CONSLY.  ; SNOW REMOVAL EQUIP - CTAF. -> WHEN ATCT CLSD ACTVT MALSR RWY 12 & 30; HIRL RWY 12/30; MIRL RWY 11/29 - CTAF. PAPI RWY 12 & 30 OPR CONSLY.  ; SNOW REMOVAL EQUIP - CTAF.","source":"FRQ","fields":[{"field":"REMARK","old":"WHEN ATCT CLSD ACTVT MALSR RWY 12; REIL RWY 30; HIRL RWY 12/30; MIRL RWY 11/29 - CTAF. PAPI RWY 12 & 30 OPR CONSLY.  ; SNOW REMOVAL EQUIP - CTAF.","new":"WHEN ATCT CLSD ACTVT MALSR RWY 12 & 30; HIRL RWY 12/30; MIRL RWY 11/29 - CTAF. PAPI RWY 12 & 30 OPR CONSLY.  ; SNOW REMOVAL EQUIP - CTAF."}]},{"cycle":"2026-01-22","from_cycle":"2025-12-25","id":"0146d359bb70","priority":"fyi","category":"navaid","kind":"changed","summary":"runway 12: remark: ILS CLASSIFICATION CODE IB. -> ILS CLASSIFICATION CODE IID.","source":"ILS_RMK","fields":[{"field":"REMARK","old":"ILS CLASSIFICATION CODE IB.","new":"ILS CLASSIFICATION CODE IID."}]},{"cycle":"2026-01-22","from_cycle":"2025-12-25","id":"ac51febf212c","priority":"fyi","category":"runway","kind":"changed","summary":"runway 12: RVR equipment: none -> touchdown, midfield, rollout (TMR)","source":"APT_RWY_END","fields":[{"field":"RWY_VISUAL_RANGE_EQUIP_CODE","old":"","new":"TMR"}]},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"5aaf7871f65b","priority":"fyi","category":"airport","kind":"changed","summary":"cold temperature airport (altitude correction at or below): -22C -> -21C","source":"APT_BASE","fields":[{"field":"CTA","old":"-22C","new":"-21C"}]},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"1f61fbb2c5f8","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: Cold temperature airport; altitude correction required at or below -21C.","source":"APT_RMK","original":"COLD TEMPERATURE AIRPORT. ALTITUDE CORRECTION REQUIRED AT OR BELOW -21C.","fields":[{"field":"REMARK","old":"COLD TEMPERATURE AIRPORT. ALTITUDE CORRECTION REQUIRED AT OR BELOW -22C.","new":"COLD TEMPERATURE AIRPORT. ALTITUDE CORRECTION REQUIRED AT OR BELOW -21C."}]},{"cycle":"2025-07-10","from_cycle":"2025-06-12","id":"dc8ed5a7f775","priority":"action","category":"remark","kind":"added","summary":"new remark: NOISE: TRAINING TRAFFIC - CHECK VOLUNTARY NOISE ABATEMENT PRO","source":"APT_RMK","original":"NOISE: TRAINING TRAFFIC - CHECK VOLUNTARY NOISE ABATEMENT PRO"},{"cycle":"2025-06-12","from_cycle":"2025-05-15","id":"e42ac16ced08","priority":"action","category":"remark","kind":"changed","summary":"remark updated: FOR CD WHEN ATCT CLSD CTC BIG SKY APCH AT 208-364-5860, WHEN ATCT AND APCH CLSD CTC SALT LAKE ARTCC AT 801-320-2568.","source":"APT_RMK","original":"FOR CD WHEN ATCT CLSD CTC BIG SKY APCH AT 208-364-5860, WHEN ATCT AND APCH CLSD CTC SALT LAKE ARTCC AT 801-320-2568.","fields":[{"field":"REMARK","old":"FOR CD WHEN ATCT CLSD IF UNA ON FSS FREQ, CTC SALT LAKE ARTCC AT 801-320-2568.","new":"FOR CD WHEN ATCT CLSD CTC BIG SKY APCH AT 208-364-5860, WHEN ATCT AND APCH CLSD CTC SALT LAKE ARTCC AT 801-320-2568."}]},{"cycle":"2025-05-15","from_cycle":"2025-04-17","id":"7e9afb5e3f32","priority":"action","category":"frequency","kind":"added","summary":"frequency 124.05 (CD/P) added","source":"FRQ"},{"cycle":"2025-05-15","from_cycle":"2025-04-17","id":"490088d9e5e2","priority":"action","category":"remark","kind":"added","summary":"new remark: FOR CD WHEN ATCT CLSD IF UNA ON FSS FREQ, CTC SALT LAKE ARTCC AT 801-320-2568.","source":"APT_RMK","original":"FOR CD WHEN ATCT CLSD IF UNA ON FSS FREQ, CTC SALT LAKE ARTCC AT 801-320-2568."},{"cycle":"2025-05-15","from_cycle":"2025-04-17","id":"35fa762b3fac","priority":"fyi","category":"remark","kind":"removed","summary":"remark removed: FOR CD IF UNA TO CTC ON FSS FREQ, CTC SALT LAKE ARTCC AT 801-320-2568.","source":"APT_RMK","original":"FOR CD IF UNA TO CTC ON FSS FREQ, CTC SALT LAKE ARTCC AT 801-320-2568."},{"cycle":"2025-04-17","from_cycle":"2025-03-20","id":"533a4d6ed865","priority":"fyi","category":"remark","kind":"added","summary":"new remark: PILOTS CONDUCTING EFVS OPS; BE AWARE LED ALS IN USE RWY 12.","source":"APT_RMK","original":"PILOTS CONDUCTING EFVS OPS; BE AWARE LED ALS IN USE RWY 12."},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"af58af19e7cc","priority":"action","category":"remark","kind":"removed","summary":"remark removed: Takeoff from runway 3 is prohibited until after confirming no traffic is using runway 12.","source":"APT_RMK","original":"TKOF RWY 3 PROHIBITED UNTIL AFTER CFMG NO TFC USING RWY 12."},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"161111b9e970","priority":"ifr","category":"procedure","kind":"changed","summary":"arrival/departure procedures new or updated: BGSKY, MEADO","source":"STAR/DP","procedures":{"updated":["BGSKY","MEADO"],"removed":[]}},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"d1f037e33566","priority":"fyi","category":"airport","kind":"changed","summary":"airport contact address: 850 GALLATIN FIELD SUITE 6 -> 850 GALLATIN FIELD RD; airport contact address line 2: none -> SUITE 6","source":"APT_CON","fields":[{"field":"ADDRESS1","old":"850 GALLATIN FIELD SUITE 6","new":"850 GALLATIN FIELD RD"},{"field":"ADDRESS2","old":"","new":"SUITE 6"}]},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"17747a78f3a4","priority":"fyi","category":"airport","kind":"changed","summary":"airport contact address line 2: SUITE #6 -> SUITE 6","source":"APT_CON","fields":[{"field":"ADDRESS2","old":"SUITE #6","new":"SUITE 6"}]},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"2ba6203ae900","priority":"fyi","category":"remark","kind":"added","summary":"new remark: 180 DEG TURN NA ON TRML RAMP.","source":"APT_RMK","original":"180 DEG TURN NA ON TRML RAMP.","untranslated":"Kept in the FAA's words: NA can mean not authorized or not available, and Amend doesn't guess which."},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"66ef351d58fa","priority":"fyi","category":"remark","kind":"added","summary":"new remark: 240 FT S OF RWY 11/29; AVBL WHEN DRY WITH ATC APVL.","source":"APT_RMK","original":"240 FT S OF RWY 11/29; AVBL WHEN DRY WITH ATC APVL."},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"e58ba5ddb6c3","priority":"fyi","category":"remark","kind":"added","summary":"new remark: ARR & DEP OPS WHEN WIND LESS THAN 10 KT; OTR RWY MAY BE USED; EXPC DLA.","source":"APT_RMK","original":"ARR & DEP OPS WHEN WIND LESS THAN 10 KT; OTR RWY MAY BE USED; EXPC DLA."},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"25ab77ab9298","priority":"fyi","category":"remark","kind":"added","summary":"new remark: CONES.","source":"APT_RMK","original":"CONES."},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"d3891361756c","priority":"fyi","category":"remark","kind":"added","summary":"new remark: LCTD BTN RWY 12/30 & TWY A; AVBL GTR THAN 12500 LB DAY/VFR ONLY.","source":"APT_RMK","original":"LCTD BTN RWY 12/30 & TWY A; AVBL GTR THAN 12500 LB DAY/VFR ONLY."},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"008beefd3d20","priority":"fyi","category":"remark","kind":"added","summary":"new remark: TKOF NA UNTIL CFMG NO TFC USING RWY 12.","source":"APT_RMK","original":"TKOF NA UNTIL CFMG NO TFC USING RWY 12.","untranslated":"Kept in the FAA's words: NA can mean not authorized or not available, and Amend doesn't guess which."},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"d7ec603d6714","priority":"fyi","category":"remark","kind":"removed","summary":"remark removed: EMAIL BRIAN.SPRENGER@BOZEMANAIRPORT.COM","source":"APT_RMK","original":"EMAIL BRIAN.SPRENGER@BOZEMANAIRPORT.COM"},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"57830ba5eff1","priority":"fyi","category":"remark","kind":"removed","summary":"remark removed: Glider operations occur on and in the vicinity of the airport.","source":"APT_RMK","original":"GLIDER OPNS ON & INVOF ARPT."},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"8762522c2273","priority":"fyi","category":"remark","kind":"removed","summary":"remark removed: LDG AREA 11G/29G TURF LCTD 240 FT S OF RWY 11/29. AVBL WHEN DRY WITH ATC APVL. MKD WITH W CONES.","source":"APT_RMK","original":"LDG AREA 11G/29G TURF LCTD 240 FT S OF RWY 11/29. AVBL WHEN DRY WITH ATC APVL. MKD WITH W CONES.","untranslated":"Kept in the FAA's words: W can mean west, white or with, and Amend doesn't guess which."},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"075f0cbacea7","priority":"fyi","category":"remark","kind":"removed","summary":"remark removed: Landing fee for aircraft over 8500 pounds.","source":"APT_RMK","original":"LDG FEE FOR ACFT OVR 8500 LBS."},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"60278f70f3f3","priority":"fyi","category":"remark","kind":"removed","summary":"remark removed: Runway 12 is normally used for arrivals and departures when wind speed is less than 10 knots; if aircraft unable to use runway 12, other runways may be used but delays may occur.","source":"APT_RMK","original":"RWY 12 IS NORMALLY USED FOR ARRIVALS/DEPARTURES WHEN THE WIND SPEED IS LESS THAN 10 KNOTS.  IF AIRCRAFT IS UNABLE TO USE RWY 12, OTHER RWYS MAY BE USED BUT DELAYS MAY OCCUR."},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"60b7dbe4c4b4","priority":"fyi","category":"remark","kind":"removed","summary":"remark removed: Runway 21 between runway 12/30 and taxiway A is available for aircraft greater than 12,500 pounds day and VFR only.","source":"APT_RMK","original":"RY 21 BTN RY 12/30 & TWY A AVBL FOR ACFT GREATER THAN 12,500 LBS DAY/VFR ONLY."},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"0a5e60603511","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: Birds in vicinity of airport.","source":"APT_RMK","original":"BIRDS INVOF ARPT.","fields":[{"field":"REMARK","old":"MIGRATORY BIRDS INVOF ARPT.","new":"BIRDS INVOF ARPT."}]},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"f6ad492882c4","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: SNOW REMOVAL EQUIP - CTAF.","source":"APT_RMK","original":"SNOW REMOVAL EQUIP - CTAF.","fields":[{"field":"REMARK","old":"SNOW REMOVAL EQUIP MONITORS - CTAF.","new":"SNOW REMOVAL EQUIP - CTAF."}]},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"82da76923bde","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: Student training activity is within 15 miles.","source":"APT_RMK","original":"STUDENT TRNG ACT WI 15 MI.","fields":[{"field":"REMARK","old":"HVY STUDENT TRNG ACTVTY WI 15 MIS OF AP.","new":"STUDENT TRNG ACT WI 15 MI."}]},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"d75b0f9c8be6","priority":"fyi","category":"frequency","kind":"changed","summary":"remark: WHEN ATCT CLSD ACTVT MALSR RWY 12; REIL RWY 30; HIRL RWY 12/30; MIRL RWY 11/29 - CTAF. PAPI RWY 12 & 30 OPR CONSLY.  ; SNOW REMOVAL EQUIP MONITORS - CTAF. -> WHEN ATCT CLSD ACTVT MALSR RWY 12; REIL RWY 30; HIRL RWY 12/30; MIRL RWY 11/29 - CTAF. PAPI RWY 12 & 30 OPR CONSLY.  ; SNOW REMOVAL EQUIP - CTAF.","source":"FRQ","fields":[{"field":"REMARK","old":"WHEN ATCT CLSD ACTVT MALSR RWY 12; REIL RWY 30; HIRL RWY 12/30; MIRL RWY 11/29 - CTAF. PAPI RWY 12 & 30 OPR CONSLY.  ; SNOW REMOVAL EQUIP MONITORS - CTAF.","new":"WHEN ATCT CLSD ACTVT MALSR RWY 12; REIL RWY 30; HIRL RWY 12/30; MIRL RWY 11/29 - CTAF. PAPI RWY 12 & 30 OPR CONSLY.  ; SNOW REMOVAL EQUIP - CTAF."}]},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"4957b15d35ea","priority":"fyi","category":"runway","kind":"changed","summary":"runway 11G: markings: none -> nonstandard (other than numbers only) (NSTD)","source":"APT_RWY_END","fields":[{"field":"RWY_MARKING_TYPE_CODE","old":"","new":"NSTD"}]},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"33eeede3e84c","priority":"fyi","category":"runway","kind":"changed","summary":"runway 29G: markings: none -> nonstandard (other than numbers only) (NSTD)","source":"APT_RWY_END","fields":[{"field":"RWY_MARKING_TYPE_CODE","old":"","new":"NSTD"}]},{"cycle":"2024-10-03","from_cycle":"2024-09-05","id":"f2c19bbfbaf0","priority":"action","category":"navaid","kind":"removed","summary":"ILS RWY 12 (BZN): outer marker removed","source":"ILS_MKR","fields":[{"field":"RWY_END_ID","old":"12","new":""},{"field":"ILS_LOC_ID","old":"BZN","new":""},{"field":"SYSTEM_TYPE_CODE","old":"LS","new":""},{"field":"ILS_COMP_TYPE_CODE","old":"OM","new":""},{"field":"COMPONENT_STATUS","old":"OPERATIONAL IFR","new":""}]},{"cycle":"2024-09-05","from_cycle":"2024-08-08","id":"39688e4baf06","priority":"ifr","category":"procedure","kind":"changed","summary":"arrival/departure procedures new or updated: POWDA1, SUBKY1","source":"STAR/DP","procedures":{"updated":["POWDA1","SUBKY1"],"removed":[]}},{"cycle":"2024-09-05","from_cycle":"2024-08-08","id":"53d92f00dea4","priority":"fyi","category":"airport","kind":"changed","summary":"cold temperature airport (altitude correction at or below): -31C -> -22C","source":"APT_BASE","fields":[{"field":"CTA","old":"-31C","new":"-22C"}]},{"cycle":"2024-09-05","from_cycle":"2024-08-08","id":"24a32dfc0540","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: Cold temperature airport; altitude correction required at or below -22C.","source":"APT_RMK","original":"COLD TEMPERATURE AIRPORT. ALTITUDE CORRECTION REQUIRED AT OR BELOW -22C.","fields":[{"field":"REMARK","old":"COLD TEMPERATURE AIRPORT. ALTITUDE CORRECTION REQUIRED AT OR BELOW -31C.","new":"COLD TEMPERATURE AIRPORT. ALTITUDE CORRECTION REQUIRED AT OR BELOW -22C."}]}],"first_cycle":"2024-09-05","last_cycle":"2026-09-03"}