Welcome to Additional Military Layers (AML). AML is a NATO-wide initiative, co-ordinated by the UKHO. These pages have been created to widen and deepen understanding of the AML concept and provide a channel to communicate key technical documents and information.

The UKHO provides specialist information to its defence customers. Traditionally, this has been provided as overlays or modified charts and more recently as bespoke digital products designed for a particular purpose. AML now provides the defence customer with a unified, current product, satisfying the needs of all defence users.

The material on these Additional Military Layers pages is provided for your use. Views and opinions expressed in documents not prepared by the UKHO and posted to these pages do not reflect those of the UKHO, and the UKHO gives no warranty of any type as to the accuracy, completeness or currency of any information provided in such documents. The terms and conditions of use of this website also apply to these pages.

For additional information relating to NATO development of the AML concept please follow the link via the NATO logo. Only users that have been supplied with a valid username and password will have access to the site. If you experience difficulties gaining access, please contact the AML Service Delivery Manager at aml@ukho.gov.uk.

News
Significant developments will be highlighted in these pages, and the AML Newsletter will be updated periodically. To register to receive the latest information about AML, click here.

Technical Workshops
Technical Workshops are held at regular intervals in order to facilitate involvement by industry in the development of the AML concept and capability. They are intended to promote an open technical dialogue across the entire AML stakeholder community. Click here to access information relating to the Technical Workshops.

Sample Data
AML data is now being produced by the UKHO and agencies in other nations. For developers of systems that will use AML, sample datasets are available for download. The datasets are encapsulated using the International Hydrographic Organisation's S57 exchange standard for digital hydrographic data.

Product Specifications
NATO-endorsed Product Specifications for the current range of AML products and their associated S57 exchange standard implementation annexes are provided here.

Production Specifications
NATO-endorsed Production Specifications (as distinct from the AML Product Specifications) describes details of how the content of any given AML dataset is to be encoded. This document covers the entirety of AML and is necessary to ensure that datasets are not only conformant to the AML Product Specifications but that the data produced by a wide range of producers is consistent in support of coalition interoperability. The document is provided here.

Object and Attribute Catalogue
Click here to access the Object and Attribute Catalogue, which covers the data models from published AML product specification.

AML Handbook - version 2.1
This handbook will introduce the reader to the concept of AML, the current products, how they can be delivered and the way in which they can be used. To download the handbook in pdf format please click here.

Feedback
We welcome your feedback on this initiative. Please click here to comment.