What it is
An agreement, not a test standard
STANAG 4560 is a NATO standardization agreement: a short document by which NATO nations commit to implementing a named Allied Publication, in this case AOP-43, electro-explosive devices, assessment and test methods for characterization. The STANAG itself carries none of the characterization methods. It states the interoperability aim, names the publication that carries the requirements, and sets out how nations ratify and implement it. This is Edition 4, promulgated by the NATO Standardization Office on 5 December 2025, and it supersedes STANAG 4560 Edition 3, dated 21 November 2016, bringing AOP-43 Edition D into force in place of AOP-43 Edition 3.
What nations are agreeing to
The stated aim is interoperability: NATO nations are asked to agree that they will "characterize Electro-Explosive Devices using the same test methods," keep results reproducible between test houses, and share data with each other. Participating nations then agree to implement "AOP-43, Edition D" as the standard that delivers that aim. The characterization methods themselves belong to AOP-43; this STANAG's role is to get nations to agree to use them consistently, not to describe them.
Ratification and implementation are two different steps
A STANAG binds a nation once it is ratified, and ratification and implementation are tracked separately here. National responses are recorded in the NATO Standardization Documents Database (NSDD), and nations are invited to examine their own ratification status and, where they have not already done so, tell the NATO Standardization Office their intentions. Implementation is a further step: a ratifying nation is considered to have implemented this STANAG once it has updated its national policy on electro-explosive-device characterization to incorporate the tests of AOP-43, and updated its national testing procedures and guidance to match. Allies and NATO bodies report their implementation details through the same electronic reporting tool; partner nations are invited to do the same. The cover sets no NATO-wide effective date of its own - "NATO Effective Date (NED): Not applicable" - so the date a supplier actually has to watch is the one in their own contract, not one this document starts.
What this edition changed
The cover's own additional-information note says this edition updates the terminology used for electro-explosive-device characterization to align with NATO's standard vocabulary, and makes further changes to the characterization test regime. The detail of those changes is AOP-43's own content, not this cover's, so it belongs on that standard's own page rather than here.
Where it sits alongside other agreements
The cover lists several related NATO documents without invoking any of them as binding requirements of this STANAG: AOP-43 itself, STANAG 4147 (AOP-4147) on chemical compatibility of energetic materials with munition components, STANAG 4157 (AOP-4157 and AOP-20) on safety, arming and functioning systems testing, STANAG 4170 (AOP-07) on qualifying explosive materials for military use, and STANAG 4370 (AECTP-100 and AECTP-600) on environmental testing. The STANAG's own review cycle runs under AAP-03.