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MSA

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(See also Central City, Standard Metropolitan Statistical Area) Areas defined by the U.S. Office of Management and Budget. A Metropolitan Statistical Area (MSA) is 1) A county or a group of contiguous counties that contain at least one city of 50,000 inhabitants or more, or 2) An urbanized area of at least 50,000 inhabitants and a total MSA population of at least 100,000 (75,000 in New England). The contiguous counties are included in an MSA if, according to certain criteria, they are essentially metropolitan in character and are socially and economically integrated with the central city. In New England, MSAs consist of towns and cities rather than counties. (DOE4) (DOE5) (FHWA3)
1) The minimum altitude specified in Federal Aviation Regulation (FAR) Part 91 for various aircraft operations; 2) Altitudes depicted on approach charts which provide at least 1,000 feet of obstacle clearance for emergency use within a specified distance from the navigation facility upon which a procedure is predicated. These altitudes will be identified as Minimum Sector Altitudes or Emergency Safe Altitudes and are established as follows: a) Minimum Sector Altitudes. Altitudes depicted on approach charts which provide at least 1,000 feet of obstacle clearance within a 25-mile radius of the navigation facility upon which the procedure is predicated. Sectors depicted on approach charts must be at least 90 degrees in scope. These altitudes are for emergency use only and do not necessarily assure acceptable navigational signal coverage; b) Emergency Safe Altitudes. Altitudes depicted on approach charts which provide at least 1,000 feet of obstacle clearance in nonmountainous areas and 2,000 feet of obstacle clearance in designated mountainous areas within a 100-mile radius of the navigation facility upon which the procedure is predicated and normally used only in military procedures. These altitudes are identified on published procedures as "Emergency Safe Altitudes." (FAA4)
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Member State Administrator
See also: Keelboat , MDC , RARP , TCE , IANA

 

Transportation Dictionary INDEX:

List of Terms: Terms beginning with "A", Page 1

Starts With:      A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 1 2 3
Page Number:      1 2 3 4 5 6

A: Page 1 of 6.

A.M. Peak Period
AAR
AB Valve
ABC
ABD Valve
ABDW Valve
ACFC
ACH
ACL
ACPI
ACS
ACSE
ACTS
ADP
ADSL
ADSP
ADTC
AEI Tag
AEP
AF
AFAIK
AFIPS
AFK
AFP
AFS
AG
AGP
AI
AIE
AIFF
AIX
ALU
AMS
ANSI
ANZEB
AOEMA
AOL
AP
APA
APAG
APCUUG
APE
APEC
API
APL
APPC
APPN
ARCnet
ARP
ARPA
ARPANet
ARS
ARU
AS
ASC
ASCII
ASEB
ASF
ASL
ASN
ASP
AT&T
ATM
ATMI
ATP
ATR
ATS
AUI
AVI
AZEB
Abaft
Abandoned Runway
Abbreviated Injur...Abbreviated Instr...Abeam
Abort
Absolute Block
Absolute Permissi...
Absolute Signal
Accelerate Stop D...Acceleration Power
Access Restrictio...Access Rights
Accessible Stations
Accessible Vehicles
Accessory or Auxi...Accident
Accident Classes
Accident Conseque...Accident Incident
Accident Severity
Accident Type
Accident1
Accident2
Accident3
Accident4
Accident5
Accounting Change...Accreditation


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