What is it ?
Classification is based an APP-6 for NATO classification see wikipedia article.

LotAtc only use a subset of this classification. It will be enhanced in the future.
How I use it ?
Depending of LotAtc Server/Generator settings, item can be auto-classified or not. In all cases, you can change it in selection’s properties or by right+click on any item.
Transponder format
As described in transponder part, you can associate a transponder code to a classification. Available fields are.
Correct format is:
"classification": {
"classification": "friend",
"dimension": "air",
"sub_dimension": "fighter"
}
Fields are optional, you can only define classification field with no dimension.
Classification
| Id | Description |
|---|---|
| unknown | Unknown |
| assumed_friend | Assumed Friend |
| friend | Friend |
| neutral | Neutral |
| suspect | Suspect |
| hostile | Hostile |
Dimension
Possible values are:
| Dimension id | Subdimension id | Description |
|---|---|---|
| unknown | Pending | |
| unknown | Pending/Unknown | |
| air | Air | |
| unknown | Air/Unknown | |
| fighter | Air/Fighter | |
| fighter_bomber | Air/Fighter/Bomber | |
| bomber | Air/Bomber | |
| tanker | Air/Tanker | |
| sead | Air/SEAD | |
| escort | Air/Escort | |
| aew | Air/AEW | |
| rotary_wing | Air/Rotary-wing | |
| uav | Air/UAV | |
| patrol | Air/Patrol | |
| reco | Air/Reconnaissance | |
| attack_strike | Air/Attack/Strike | |
| csar | Air/CSAR | |
| sar | Air/SAR | |
| cargo | Air/Cargo | |
| land_unit | Land unit | |
| unknown | Land unit/Unknown | |
| combat | Land unit/Combat | |
| ew | Land unit/EW | |
| special_force | Land unit/Special forces | |
| sea_surface | Sea surface | |
| unknown | Sea surface/Unknown | |
| carrier | Sea surface/Carrier | |
| cruiser | Sea surface/Cruiser | |
| destroyer | Sea surface/Destroyer | |
| frigate | Sea surface/Frigate | |
| corvette | Sea surface/Corvette | |
| civilian | Sea surface/Civilian | |
| own_ship | Sea surface/Own Ship | |
| land_installation | Land installation | |
| unknown | Land installation/Unknown | |
| air_defense_missile | Land installation/Air defense missile launcher | |
| air_base | Land installation/Air base | |
| radar | Land installation/Radar | |
| ammunition | Land installation/Ammunition | |
| naval_base | Land installation/Naval base | |
| sea_subsurface | Sea subsurface | |
| unknown | Sea subsurface/Unknown | |
| submarine | Sea subsurface/Submarine | |
| activity_event | Activity/Event | |
| unknown | Activity/Event/Unknown | |
| air_civil | Civil Air | |
| unknown | Civil Air/Unknown | |
| sea_surface_civil | Civil Surface Air | |
| unknown | Civil Surface Air/Unknown | |
| land_civil | Civil Land | |
| unknown | Civil Land/Unknown |