AD3 (air defence)

AD3 means air defence. The NATO glossary of acronyms and abbreviations lists the entry as "AD3, air defence", with the French equivalent "défense aérienne / DA2", and identifies AAP-06 as the source. The glossary is published in the NATO Archives.

NATO describes air defence as a collective defence function that protects Allied airspace. It brings together fighter aircraft, sea- and surface-based air and missile defence systems, and counter-drone technologies, and it is maintained in peacetime, crisis and conflict, according to NATO's air defence page.

Where the AD3 entry comes from

The entry cites AAP-06, NATO's terminology publication. NATO's official terminology database, NATOTerm, is maintained by the NATO Terminology Office within the NATO Standardization Office. It holds non-classified NATO military terminology.

The expanded form is singular and uses the spelling "defence", which is also the Canadian spelling. Bid teams reading NATO-derived requirements will see the same spelling in Canadian documents.

What NATO air defence covers

NATO air defence is a continuous activity. It includes air surveillance, quick-reaction fighter aircraft, surface-based systems, missile defence and counter-uncrewed-aircraft capabilities.

NATO uses broader terms for the wider concept. Integrated Air and Missile Defence (IAMD) addresses air and missile threats from all strategic directions and includes both air defence and ballistic missile defence. It is implemented through the NATO Integrated Air and Missile Defence System (NATINAMDS), which is made up of interconnected national and NATO sensors, command-and-control assets and weapons systems.

On the command side, Allied Command Operations identifies Headquarters Allied Air Command as responsible for planning and directing air-component operations and for executing Alliance air and missile defence operations and missions.

Air defence in Canadian defence procurement

Canadian federal sources use the plain term "air defence". The Department of National Defence reports an Air Defence project to acquire a soldier-portable Very-Short Range Air Defence System (VSHORAD) for the NATO enhanced Forward Presence Battle Group in Latvia. The stated purpose is to defeat attack aircraft and hostile small unmanned aircraft in the area of operations. The DND procurement disclosure states that a request for proposals was issued in summer 2023, with contract award expected in early 2024.

Canada.ca also maintains an air equipment procurement portfolio. It covers fighter aircraft, which serve air defence, ground attack, tactical support, training, and testing and evaluation roles.

The Latvia project shows that air defence requirements can arise in procurements that support deployed or multinational NATO missions.

What AD3 means for a supplier

A procurement labelled air defence may concern systems or services that detect, deter, defeat or mitigate aerial threats, including aircraft and small unmanned aircraft. Treat the label as a signal of subject matter, not as a requirement in itself.

• Read the statement of work and the mandatory technical requirements closely.
• Check the security requirements and the evaluation criteria before committing bid resources.
• Follow the instructions in the solicitation, which set the terms of each bid.
• Monitor new opportunities on CanadaBuys, the federal tendering service.

Suppliers with counter-drone, surveillance, sensor, command-and-control or fighter-support offerings should map their products to the NATO air defence capabilities described above, since NATO terminology shapes how Canadian requirements are framed.