I try to look forward and flip to my back to look backward every five or so strokes, but my goggles eventually fog up. It's hard to see boats unless I'm constantly stopping to clean out my goggles.
Would it be a good idea to tie a helium mylar balloon around my waist? I think this would be a good way for boats to notice me more easily.
I swim for about 1-2 hours. Usually I see at least two boats: