Hi Luc,
Thanks very much for taking the time to reply, that's really insightful and I'm sure it will be useful next time I'm out.
I know this probably sounds like a silly question, but is there a technique to identifying structure? I mean, you mentioned deep holes for jewfish, but how do I know where a deep hole in an estuary is? The same with things like weed beds, apart from identifying them by eye (which means going at a lower tide/getting snagged on them!), are there tell-tale signs I can use to start reading the water a little better while I'm actually out fishing?
Sorry, I know it's time-consuming writing a detailed reply, that's why I was asking if it's possible to buy maps or whether there are websites specifically devoted this sort of thing.
Thanks again!