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As described in the Network Capability pages, a considerable amount of detailed information is contained in the National Electronic Sectional Appendix (NESA).
It also contains other data useful to operators that is not directly relevant to network capability.
NESA is an electronic data source with significant advantages over a hard copy publication. These include:
Across the network, changes arise every week (eg from track renewals to major construction activity) which are published first in the Weekly Operating Notice (WON) and rapidly incorporated in NESA.
To access the NESA you need:
To set up a Portal account and access to NESA, email firstname.lastname@example.org with the following information:
NB the NESA mailbox is for access requests only. To raise any other issues regarding NESA please email email@example.com.
We can normally confirm registration and account details within 10 working days.
The NESA track diagrams (known as Table A diagrams) are rendered in a format known as scaleable vector graphics (SVG).
To view these, you need a suitable SVG viewer on your computer or device. Many of these (such as Adobe SVG viewer) can be downloaded free from the web. Some viewers can be implemented as a plug-in to Internet Explorer and other browsers. Your IT department should be able to advise you.
Once registration has been completed we will send you an email, with a unique username and password, explaining how to access NESA.
For up-to-date information and best user experience, we recommend you request access to the online system.