Sector A

{{Article|hl1|safe}}
{{Location Infobox
|image=FileSector A composite.jpg|250px
|image2=
|name=Sector A
|constructed=
|destroyed=200-, during the Black Mesa Incident
|location=Black Mesa Research Facility
|builder=
|era=Black Mesa Incident
|affiliation=Black Mesa
|maps=
|designer=
|hideg=yes
}}
{{Quote|Hello and welcome to the Black Mesa Hazard Course, where you'll be trained in the use of a hazardous environment suit. I am your holographic assistant.|Gina Cross' Holographic Assistant counterpart|Half-Life|FileTr holo intro.ogg}}

'''Sector A''' is one of the seven main CategoryBlack Mesa Sectors|Sectors of the Black Mesa Research Facility.FileTram map 01.png|Black Mesa Transit System map It is connected to the Green Line of the Black Mesa Transit System.

==Area 4 Personnel Dormitories==
As seen in the FileBarney schedule.jpg|Security Shift Schedule given to Barney Calhoun, Sector A includes the Area 4 Personnel Dormitories.

Two security guards started their Red (from 0900 to 2200) and Orange (from 2100 to 1000) Shifts in the Area 4 Personnel Dormitories on May 15, 200-.

==Training Facility==
{{Main|Black Mesa Training Facility}}

The Black Mesa Training Facility, also known as the Hazard Course, is a recurring location featured in ''Half-Life'' and its expansions. It is used for training the Black Mesa personnel. It also serves as an in-game training for the games.

===Gallery===
{{CollapsedGallery|01|
FileT0a0 suit.jpg|Introducing the suit.
FileT0a0 jump01.jpg|Movement training.
FileT0a00006.jpg|Ditto.
FileT0a0a0002.jpg|The Long Jump training.
|
FileT0a0a0007.jpg|Ditto.
FileT0a0a0008.jpg
FileT0target.jpg
FileT0a0a0010.jpg|The Health Charger training.
FileT0a0a0011.jpg
FileT0a0b10000.jpg
FileT0a0b10003.jpg
FileT0a0b10004.jpg|The flashlight training.
FileHl 2012-05-22 21-20-10-66.jpg|The Target Range.
FileT0a0b20005.jpg
FileT0a0b20008.jpg
FileT0a0c0000.jpg|The Suit Charger training.
FileT0a0c0004.jpg|Ditto.
FileT0a0d0001.jpg
FileT0a0d0002.jpg
FileHl 2012-05-22 21-10-30-28.jpg
FileT0a0d00001.jpg|The Rail Cart training.

}}



==List of appearances==
===Main games===
*''Half-Life''
*''Half-Life Opposing Force''
*''Half-Life Blue Shift''
*''Half-Life Decay''

===Other===
*''Half-Life Day One'' {{1st}}
*''Half-Life Uplink'' {{Nc}}

==References==
{{Reflist}}

{{succession
|title=''Half-Life'' story arc journey
|before=Black Mesa Transit System
|after=Black Mesa Transit System
}}
{{succession
|title=''Half-Life Blue Shift'' story arc journey
|before=N/A
|after=Area 8 Topside Dormitories
}}
{{succession
|title=''Half-Life Decay'' story arc journey
|before=Sector C
|after=Satellite Communications Center
}}
{{Locations}}
{{Black Mesa}}
CategoryLocations
CategoryHalf-Life
CategoryHalf-Life Blue Shift
CategoryHalf-Life Opposing Force
CategoryHalf-Life Decay
CategoryBlack Mesa Sectors