Excrab
I think the point being made (tongue in cheek) is that if you brief properly and navigate properly and take your flying "seriously" there is not a great deal for you in GASIL - for everyone else it is worth a read!!
In my opinion the real lesson is to establish why this type of issue arises all to frequently. I share the view of those who have said the training industry is very poor at informing pilots where to get this information and what is required to ensure they have breifed themselves properly.
In this country it reamins the case that it is difficult to see how this essential information could be supplied in a more disjointed and un-userfriendly way.
If the authorities are really interested in preventing the next re-occurence then they should at least ensure the training industry is doing its job properly AND the relevant information is made available in the most effective way possible.