I believe water represents emotion/emotional issues.
I had a dream were a man was killed by someone else and I was given the body
(in a lined wire egg basket) to get rid of. I threw it into a river.
Still don't know what that was all about.
Not sure if I understood your question about dream memory.
I've dreamt about stuff and then had it happen.
Usually there is a difference between the dream and the reality though,
which is what makes me realise I'd dreamt it.
Like in the dream, this happens next, when in real life something else occurs.
Astral projection in dreams. Hmm, seems you'd have to be pretty aware that you're dreaming before you could do that. Even when I have awareness that I'm dreaming I
usually lose it, getting caught up in the dream again. So don't know how you
could learn something like that. Wonder if it's it's an ability that some have,
like a knack for math, or if it's spontaneous.
Flying, I've done very little of that and when I have my flight pattern
is like I'm at the end of a rope with huge dips down.
Since I've not much to contribute, I wish you the best and I'm outta here.