ACP3 (air checkpoint)

ACP3 stands for air checkpoint. The expansion comes from the Glossary of NATO Acronyms and Abbreviations (AAP-15), where the entry reads "ACP3, air checkpoint" and is attributed to NASG, the NATO terminology usage source.

It is a NATO air-operations term. The glossary confirms the abbreviation and its expansion, and it sits alongside two close neighbours, ACP4 and ACP5, which mean different things. Anyone reading allied or defence documents should keep the three apart.

What the NATO glossary entry says about ACP3

The AAP-15 glossary lists ACP3 in one exact form: the letters ACP followed directly by the numeral 3, with no space. The expansion given is "air checkpoint". The entry is attributed to NASG.

• Abbreviation: ACP3
• Expansion: air checkpoint
• Source attribution: NASG (NATO terminology usage)
• Published in: the Glossary of NATO Acronyms and Abbreviations, AAP-15

The glossary gives the expansion only. It does not add a longer explanatory definition, so this page does not invent one. What can be stated with confidence is the abbreviation, its meaning and where NATO records it.

ACP3 compared with ACP4 and ACP5

The entries next to ACP3 in the same glossary are easy to confuse with it because the letters are identical and only the final digit changes. NATO treats them as three separate terms.

• ACP3: air checkpoint
• ACP4: air control point
• ACP5: airspace control plan

An air checkpoint is not an air control point, and neither is an airspace control plan. When a document uses one of these abbreviations, the digit determines the meaning. A bid team that reads "ACP4" as "air checkpoint", or the reverse, has misread the requirement.

The same glossary also contains many other abbreviations beginning with ACP. The numeral is part of the abbreviation itself, which is why the glossary writes ACP3 rather than "ACP 3".

Where NATO maintains its terminology

NATO publishes its non-classified terminology through NATOTerm, its official terminology database. According to the NATOTerm home page, the database covers non-classified military terminology and relevant non-military terminology. It is maintained by the NATO Terminology Office, which is part of the NATO Standardization Office.

The AAP-15 glossary and NATOTerm are the reference points for how NATO writes and expands its abbreviations. A supplier who meets ACP3 in allied documentation can check the abbreviation against these NATO sources instead of relying on informal usage.

What ACP3 means for a supplier bidding on Canadian public contracts

ACP3 is a NATO glossary entry. The NATO sources tie it to no named Canadian department, defence program, solicitation, contract, policy or procurement clause, so there is no Canadian supplier action attached to the term itself.

If ACP3 turns up in a statement of work, a technical annex or allied reference material that comes with a Canadian tender, read it as air checkpoint and confirm the meaning against the definitions in that solicitation. Do not substitute ACP4 (air control point) or ACP5 (airspace control plan). Where the tender documents define a term differently from the NATO glossary, the tender documents govern your response, and unclear wording should go to the contracting authority as a question during the bid period.

Suppliers who want to look at published Government of Canada datasets can use the Open Government open data search. For terminology, the NATO glossary and NATOTerm remain the authoritative references for this abbreviation.