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STANAG 4144
STANAG 4144 ballistic data for fire control systems
Manufacturers of NATO artillery and mortar ammunition, and the national test ranges and fire-control authorities that determine and exchange the ballistic data those weapons' fire-control computers need.
STANAG 4144 sets out how NATO nations determine and exchange ballistic data for artillery and mortar fire control systems. NATO has not released it publicly; this page describes it from the Czech defence standard that implements it.
- Edition
- 3
- Published
- 2018-08-22
NATO has not released this STANAG publicly. It is NATO UNCLASSIFIED, and organisations that need it obtain it through their national standardization authority.
What it is
STANAG 4144 is the NATO Standardization Agreement on firing techniques to determine ballistic data for fire control systems. Edition 3, promulgated in August 2018, sponsored by CNAD, AC/225 NAAG, ICGIF. It covers the publication AOP-65(A).
NATO has not released STANAG 4144 or AOP-65(A) publicly. This page describes them from a public national implementation, the Czech defence standard ČOS 102502 (4th edition, Prague 2020), which states that it introduces STANAG 4144 edition 3 and AOP-65(A) into Czech use, replacing ČOS 102502's 3rd edition. It sets out procedures for determining and exchanging fire-control data for indirect and direct-fire artillery and mortar systems, applies to all such systems the Czech ground forces acquire from the standard's effective date, and does not apply to rockets or guided munitions. A national implementation can add national requirements and reservations, so treat what follows as the Czech implementation's content, not as NATO's own text.
What the Czech implementation covers
ČOS 102502 sets out how a gun-and-ammunition combination's fire control inputs (FCI) are determined and exchanged between NATO nations: fixed sets of technical data used in fire-control computers running NATO's standard trajectory models, the point mass and modified point mass models, both defined in the companion standard ČOS 109001, and in producing firing tables. It groups that data into five categories: physical and auxiliary-motor data, interior ballistics, aerodynamic data, ballistic fitting (correction) factors, and probable errors, each built up from firing-test programmes and data-analysis methods the standard sets out for indirect-fire, mortar and direct-fire systems.
For aerodynamic coefficients, the standard ranks the permitted determination methods by preference: full-scale firing tests, an aeroballistic firing range, wind-tunnel testing, and computer simulation by computational fluid dynamics or semi-empirical interpolation, each checked against measured firing results before it can be accepted. NATO fire control systems use what the standard calls the C system of aerodynamic coefficients; it describes the older K system, also known as aeroballistic coefficients, as obsolete and requires it to be converted using relations set out in ČOS 109001.
Nations exchange the resulting measurements as a results summary: an outline of the test programme and instrumentation used, a statistical report of the fitting factors and probable errors found for each ammunition type, and, where relevant, auxiliary rocket-motor or base-bleed performance data. STANAG 4635, the NATO Armaments Error Budget, sets out how these probable errors fit into the wider error model.
A public NATO test-methodology publication, AAS3P-23, states: "Data reduction for input to the fire control system shall be in accordance with STANAG 4144." The same publication's mortar-munition test procedures also require propellant temperature sensitivity tests to be conducted in accordance with STANAG 4144 Annex F, Paragraph 6.
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A supplier bound by STANAG 4144 through a contract holds the obtained text through its national authority. In ComplyTrain you record the requirements that apply to you as your own requirements, give each an owner, and keep the evidence that shows you meet them against each one.
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