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This is highly dependent on the type of water as well as the location, but I'll summarise a few things to be aware of. In many locations most of these dangers won't factor in, but they're useful things to bear in mind if you're trying to assess the danger of a particular body of water. I'll focus on the sea here - for other things such as rivers similar ...


6

I have a couple of extra points that were always relevant for us as kids growing up in an extremely tidal area (peaking at 16knots - 30mph!): Between islands, tidal races are usually predictable, and the local tide chart will let you know when slack tide (either high or low) is - these will be relatively safe times to swim. Halfway between these times the ...


5

That looks like fossilised coral (possibly a sponge?), the outside is smooth because it's been worn down by the erosion of the sea. There is quite a lot of fossilised corral on the north Wales coast, it was once a shallow, tranquil, tropical Carboniferous sea The Carboniferous period from wiki: The Carboniferous is a geologic period and system that ...


2

Adding one more, from my own experience: a "false floor". I stepped into a lake fully dressed with shorts and sandals, because I saw it was just 10 cm deep. Unfortunately, what I observed as being the floor of the lake, was in fact the upper layer of plant growth... and the lake was, at this shore, in fact more than 1 metre deep (but shallow enough to ...



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