Add sectorization for VVHM FIR, modified airport data

[AnTruongTV]

Description of changes

Added Sector 1 to 7 for VVHM
Modify airport data within Viet Nam.
Modify FIR along the border between Viet Nam and Cambodia
Fixed overlap between VVHN/VVHN-1/VLVT.

Reason and motivation

Improve displacement for each sector within VVHM CTR, instead of display a whole bandbox causing aircraft calling when they not actually in that sector airspace.

New sectorization:

This has been configured to comply with VCLvACC enroute sectors assume control:

Modified intersection between VLVT/VDPF/VVHM/VVHN:

According to real life, these 4 FIR merged at D02, all FIR already modified to match with real life:

Modified FIR border between VVHM and VDPF with more precision :

Small overlap between VVHN/VVHN-1/VLVT has been fixed.

Slight modified sector name as follow:

• All sector remove "Control" at last
• Re-added "Control" from "Vietnam|VV| " to "Vietnam|VV|Control"
• "VVCL" previous display "Mekong Control" because it have prefix "VV", now modified to "VCL" instead, borrow prefix "VC" because prefix "VC" belongs to Sri Lanka and call "Radar" which will make "VCL" to showing on map as "Mekong Radar" which is the correct callsign we looking for.

Modified airport data:

• Removed VVNT which is not existed anymore.
• Modified name for some airport.
• Added airport data for some airport.

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[github-actions]

Validate data: https://vatsim-radar.com/data/vatspy/1072/compare

For controllers data testing visit https://docs.vatsim-radar.com/contributing/debug.html

[github-actions]

Contributor data:

• CID: 1634146
• Name: Nguyen An Truong
• Region: VATSEA / Vietnam-Cambodia-Laos
• Role: N/A
• Approving CID: 1357854
• Approving staff: Amos Ng

[amosngSP]

@AnTruongTV As spoken, VCL FIR Code will make it show up as part of Sri Lanka. You can revise it and use a FIR code not used by other countries.

[AnTruongTV]

Removed all military airport is needed, we have real life frequency attach to those airport, I dont want to explain with national defense about those, so better just remove them all together, on the list now should be only civil airport/civil mixed military airport, all military airport has been removed from database

[Adrian2k]

What is the reason for VVCL now being XVCL, yet both are still specified under the county Vietnam?
Wouldnt it be more logical to keep it as VVCL and add VCL as secondary (basically the way you have done it with XVCL now)

[amosngSP]

What is the reason for VVCL now being XVCL, yet both are still specified under the county Vietnam?
Wouldnt it be more logical to keep it as VVCL and add VCL as secondary (basically the way you have done it with XVCL now)

VCL doesn't cover just Vietnam. It covers the airspace of 4 countries. We wanted a better way to reflect its callsign and country neutrality.

VCL by itself wasn't an option as this would show it under Sri Lanka.

[AnTruongTV]

As Amos said, VCL covered 4 FIRs to be exact, its 3 country, using VCL only was my plan from the beginning but it conflict with VC from Sri Lanka, if there was any special rules to show just VCL - Mekong RADAR it will be great. VVCL before work but the callsign shown is Mekong CONTROL instead.