Airport obstruction chart

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Title:: Airport obstruction chart : OC 192, Helena Regional Airport, Helena, Montana
Publisher:: United States. National Ocean Service
Name on Item:: surveyed and compiled by the National Ocean Service (NOS)
Date:: 1988
Format:: Maps/Atlases
Location:: Boston Public Library
Central Library in Copley Square
Collection (local):: U.S. Government Documents Maps Collection
Subjects:: Airports--Montana
Runways (Aeronautics)--Montana
Aeronautical charts--Montana
Places:: Montana > Lewis and Clark (county) > Helena
Helena Regional Airport
Extent:: maps ; 76 x 121 cm or 121 x 76 cm
Terms of Use:: No known copyright restrictions.
No known restrictions on use.
Publisher:: Washington, D.C. : The Service
Edition:: 9th ed., field surveys June 1988, published Dec. 1988.
Scale:: Scale 1:12,000
Projection:: Lambert conformal conic projection
Language:: English
Notes:: "Airport elevation 3873 feet."
Shipping list no.: 89-0169-P.
Includes runway plans and profiles, and operational data.
Identifier:: 06_01_019329A
06_01_019329B
Call #:: GOV DOCS MAP C 55.411/3:OC 192