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EC31 said..
For video, I use a Sanyo Xacti. Full HD video, saves to SD Ram, 4 hour battery life. Submersible to 10 metres. Sadly, not made any more.
For photos on the last trip, a Nikon D50 with a choice of 28-50 or 50-200. Otherwise, a fairly old Sony DSC-S600 with a rather unreliable zoom. And a battery cover held on with electrical tape.
The Xacti was the camera of choice by yachting bloggers/youtube and is available still secondhand. Not as tough as the Olympic or Pentax tough cameras, I would not try standing on one or dropping it.
http://www.ebay.com.au/itm/SANYO-Xacti-Video-Camera-VPC-GH3-Full-HD-1920x1080-/332371888225?hash=item4d62e88861:g:otoAAOSw8FRZsNpt