The multi-exposure that Les uses can be very effective in near constant water conditions, freezing specular drops, it is not really any good with coastal waves.
Sorry Baxter I have to disagree with you or at least modify your comment re coastal waves. Multiples do work with moderately sizes waves. For those who have my book see page 60 "Tide Artog, Wales" to see the result of multiples with waves.
"Digital circuits are made from analogue parts"
Fourtune Cookie-Brooklyn May 2006