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Volumes are indivisible elements of airspace which form sectors. Volumes are defined the same way as shapes are and are automatically closed.
| Element | volume | |
|---|---|---|
| Attribute | Format | Remarks |
| id | string | volume id - used when referring to the volume |
| fir | string | FIR in which the volume occurs (avoids duplicates) |
| bottom | integer | Base level of airspace block |
| top | integer | Top level of airspace block |
<volume id="Y_sect_1" fir="ABXX" bottom="000" top="999"> <point lat="N0494918000" lon="E0041835000" /> <point lat="N0494918000" lon="E0041835000" /> <point lat="N0494918000" lon="E0041835000" /> </volume>