This page describes all possible values of the activity entity.

AD_TFCAll traffic on the manoeuvring area of an aerodrome and all aircraft flying in the vicinity of an aerodrome.(Annex11).
HELI_TFCHelicopter or gyrocopter operations.
TRAININGFlights conducted for the purpose of training.
AEROBATICSThe usage of unusual or artful flying manoeuvres for recreation, competition, or entertainment.
AIRSHOWA show at which aircraft are on view and featuring aerial displays.
SPORTThe competition or practice by an individual or a group to achieve the best aerial performance. A type of special air traffic. This could be an air race or aerobatic training or competition.
ULMUltra light flights.
GLIDINGFlying a non-power-driven heavier-than-air aircraft.
PARAGLIDERRecreational and competitive flying sport using a free-flying, foot launched aircraft.
HANGGLIDINGRecreational and competitive flying sport using a small glider from which the operator is suspended in a frame and which is controlled by movements of the body.
PARACHUTEExiting a flying aircraft by an individual using a parachute.
AIR_DROPThe dropping of troops, supplies, bombs, etc., from an aircraft.
BALLOONFlight activity involving a bag called the envelope that is capable of containing heated air, with a gondola or basket suspended beneath.
RADIOSONDEThe lifting of devices through the atmosphere, which are tied to a helium or hydrogen filled balloon. A type of special air traffic. Radio probe and meteorological balloons are examples.
SPACE_FLIGHTVertical launch for space flight operations.
UAVThe operation of a powered, aerial vehicle that does not carry a human operator.
AERIAL_WORKOperations in which an aircraft is used for specialized services. A type of special air traffic. Services such as agriculture, construction, photography, surveying, observation and patrol, search and rescue, aerial advertisement, etc. are examples.
CROP_DUSTINGSpraying crops with fertilizers, pesticides, and fungicides from an agricultural aircraft.
FIRE_FIGHTINGIntense fire fighting activity involving chemical agents being laid down from fire fighting aircraft.
MILOPSThe execution of operations by the military.
REFUELTransfer of fuel between aircraft in the air.
JET_CLIMBINGClimb-out of jet aircraft via predefined and common tracks.
EXERCISEIntercepting and destroying of hostile aircraft or conducting similar training activities.
TOWINGDrawing or pulling through the air a target for aerial shooting practice.
NAVAL_EXERNaval forces (for example: vessels or aircraft) conduct firing and/or munitions exercises.
MISSILESThe launch, transit, and targeting of guided missiles.
AIR_GUNThe delivery of air to air or air to ground weapons for the destruction of a target.
ARTILLERYThe discharge of a projectile into the air for the destruction of a target.
SHOOTINGThe discharge of a gun or bow to propel arrows, bullets, etc swiftly or violently direct and sharply in specified directions. 
BLASTINGControlled use of explosives to excavate or remove rock.
WATER_BLASTINGThe action or an act of forcing out or emitting something suddenly underwater.
ANTI_HAILThe use of small rockets to protect crops by seeding clouds with small particles that prevent hailstorms from forming.
BIRDBird hazard.
BIRD_MIGRATIONA high number of bird species as they fly instinctual routes based on breeding or diverse environmental urges.
FIREWORKLaunching of pyrotechnic devices.
HI_RADIOElectromagnetic fields produced by high intensity radio transmission.
HI_LIGHTNon-navigational lights with high visibility potential.
LASERA type of hazard. Laser stands for Light Amplification by Stimulated Emission of Radiation. An example is a laser light show.
NATUREWildlife, flora, fauna or features of geological or other special interest which is reserved and managed for conservation.
FAUNAThe animals or animal life of a given area, habitat, or epoch which is easily and dangerously aroused by excessive aerial noise such as from an aircraft. A type of protection. Examples include mink or turkey farms and zoos.
NO_NOISEAirspace in which special procedures or other precautionary measures are established for reducing noise.
ACCIDENTAirspace needing a protective status due to an investigation of a flight catastrophe.
POPULATIONAn area with a high concentration of inhabitants.
VIPThe presence of an individual of renowned status and considered as a very important person.
VIP_PRESThe presence of an individual with status of head of state.
VIP_VICEThe presence of an individual with status of Vice-Head of State.
OILAn area in which oil occurs in quantities worthy of exploitation.
GASPumping natural gas from the ground or converting gasoline into vapour.
REFINERYA facility where petroleum and/or petroleum products are refined.
CHEMICALA facility utilizing a chemical process for manufacturing.
NUCLEARAn installation which provides power, derived from fission or fusion of atomic nuclei.
TECHNICALGeneric technical activity affecting air traffic.
ATSCustom specific flight information service, alerting service, air traffic advisory service, air traffic control service, area control service, approach control service, or airport control service is provided.
PROCEDURESpecial procedures established for use by operational personnel in execution of their flight. A type of procedure/service. An overhead approach is an example of a special procedure.