Use this purchase channel if you like to upgrade your current SharkPoint for PocketPC v1.x license to a SharkPoint DualPack (PocketPC & Windows, professional edition) license.SharkPoint DualPack (PocketPC & Windows ) v2 is a professional digital dive log that goes way beyond simply recording dive data and printing a dive log. It is an easy to use and full-featured diver's logbook, built and maintained based on the highest industrial standards