I can't get the dark blue drop down menus to work on ...
Could I remind everyone that
AltAIS.org.uk also provides a 'bookmarks' resource for most pages within the AIS website. This allows people with browsers that don't work with the complicated AIS navigation menu to freely 'jump into' the contents of the UK AIP.
It also provides a way to generate your own Area and Route briefs if you can't use the menu, or have JavaScript disabled.