Thanks 'InTheAir', I've got it now.
wasnt that SAS one you mentioned above, but that SAS site is interesting (and a tad confusing
).
For anyone else who might be interested, the site address (with thanks to '330' over on "Wannabes") is
<A HREF="http://www.ais.org.uk/uk_aip/pdf/ad/aipad2.pdf" TARGET="_blank">http://www.ais.org.uk/uk_aip/pdf/ad/aipad2.pdf</A>
[This message has been edited by Ray D'Avecta (edited 22 December 2000).]