# > Airspace for Livingston, Montana < # > < # > Data courtesy of Lynn Alley < # > < # > File created on Tuesday, 19 January 2010 at 03:35 GMT < # > < # > US AIRSPACE INFORMATION FROM NASR DATA EFFECTIVE 12/17/2009 < # > UNOFFICAL DATA (NOT FOR NAVIGATION) < # > < # > The information in this file is composed of computed approximations of the < # > arcs and lines that make up various airspace boundaries, which have been < # > derived from lists of points along those boundaries. The point data has < # > been taken from the Federal Aviation Administration National Airspace < # > System Resource (NASR) files as published by the National Flight Data < # > Center. Errors in the computed positions of the boundaries themselves will < # > generally be less than 300 feet (although errors in the estimated positions < # > of arc center points and radii will be much larger); however, any of the < # > following factors may cause errors to be many times greater: < # > < # > 1. Errors in the NASR point data; < # > 2. Cases involving irregularly shaped boundaries, such as those formed < # > by rivers and roads, etc.; < # > 3. Cases where arcs form the boundaries of MOAs, Alert areas, or < # > Restricted or Prohibited airspace (due to imprecise descriptions of < # > such boundaries in the NASR files); and < # > 4. Errors in the methods or programs that are used to compute the < # > approximations. < # > < # > Altitude information for the ceilings and floors of special use airspace < # > contained in these files is unreliable due to the imprecise, natural- < # > language encoding of this information in the source NASR data. The same is < # > true for time-of-use information. Always refer to official sources, such < # > as current sectional charts, for authoritative information. < # > < # > Note that the software used to produce the approximations contained herein < # > has not been certified for navigational use -- CONSEQUENTLY, THIS < # > INFORMATION SHOULD NOT BE RELIED UPON FOR NAVIGATION. Use of this < # > information for any other purpose is solely at the user's risk. This < # > information is provided free of charge. No warranty, expressed or implied, < # > as to the accuracy or suitability of this information for any use is < # > provided. < # > < # > < # > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ End of the header ^^^^^^^^^^^^^^^^^^^^^^^^^^^^< # >> BILLINGS CLASS C << INCLUDE=YES TYPE=CTA/CTR TITLE=BILLINGS CLASS C BASE=SFC TOPS=7700 MSL CIRCLE RADIUS=5.00 CENTRE=N454830 W1083238 # # >> BILLINGS CLASS C << INCLUDE=YES TYPE=CTA/CTR TITLE=BILLINGS CLASS C BASE=4900 MSL TOPS=7700 MSL CIRCLE RADIUS=9.99 CENTRE=N454830 W1083238 # # >> BOZEMAN CLASS D << INCLUDE=YES TYPE=CTA/CTR TITLE=BOZEMAN CLASS D BASE=SFC TOPS=7000 MSL CIRCLE RADIUS=4.40 CENTRE=N454637 W1110911 # # >> HELENA CLASS D << INCLUDE=YES TYPE=CTA/CTR TITLE=HELENA CLASS D BASE=SFC TOPS=6400 MSL POINT=N463808 W1115305 POINT=N463803 W1115302 POINT=N463744 W1115052 POINT=N463325 W1115212 POINT=N463341 W1115358 POINT=N463341 W1115358 CLOCKWISE RADIUS=4.38 CENTRE=N463624 W1115858 TO=N463625 W1120521 POINT=N463644 W1120729 POINT=N463830 W1120656 POINT=N463811 W1120449 POINT=N463811 W1120449 CLOCKWISE RADIUS=4.38 CENTRE=N463626 W1115858 TO=N463808 W1115305 # # End of the data END