NavList:

I would certainly try it.  Very many ripples would make the sight impossible.  It doesn't take many.  

If I am using a bowl of water as an artificial horizon from my living room, just having my wife walking in the kitchen sets up enough ripples as to make the sight impossible.  I have decided that having a good relationship is more important than a good celestial sight...so I try not to say, "Honey, can you stop walking for a moment?"

I have discovered that no matter now nicely I word that request, it never ends very well.  It is always taken as a criticism of my wife's weight.

Bob