But in general you can only learn by getting confirmation or rejection. I mean, it is nice to learn how to see a sandbank by the way waves break. But you only

But in general you can only learn by getting confirmation or rejection. I mean, it is nice to learn how to see a sandbank by the way waves break. But you only know that the waves break that way on a bank, if there is confirmation of that bank. On many surfspots, this knowldge is often handed down: maybe a diver checked the rocks below, maybe someone saw it during clear water etc. So anything that confirms 'yes, you are right, waves are breaking there, because there ís a bank at X' is, IMO useful.