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The sector system in IvAc 2 will implement the following major changes:
A position is an individual controller connected to IVAO. Theoretically a position will be able to activate a number of sectors simultaneously which will be individually visible online.
A sector is an indivisible block of airspace which may be activated. Each sector is composed of the following:
<sector id="Y" name="Yellow sector" callsign="Somewhere Radar" freq="125.550" type="acc"> <volume id="Y_Sect_1" /> <volume id="Y_Sect_2" /> </sector>
The sector is defined by one of more volumes of airspace.
A volume is a polygon with a upper and lower level that defines the airspace of a particular sector. A sector with 2 different upper/lower levels such as Y sector would have two volumes.
Volumes of separate sectors may overlap and the smallest volume will be considered. Reference to the diagram above, in Y sector there is no need to cut out the APP airspace.
Note that DEL & GND sectors don't have volumes as they are linked to the aerodrome reference point & transfer conditions are different than between airborne sectors.
<volume id="Y_sect_1" bottom="000" top="999"> <point lat="N0494918000" lon="E0041835000" /> <point lat="N0494918000" lon="E0041835000" /> <point lat="N0494918000" lon="E0041835000" /> </volume>
Preset = Map configuration
Position = User connection to IVAO
Sector = What pilots / controllers see
Volume = Internal