Data logging

[Tonyhibbett]

Skipper has got me interested in an idea to connect various devices to a data logger so we can analyse performance. For example, plotting wind speed with boat speed and marking various sail adjustments to gauge the effect.
We have located various SIMNET connectors which presumably relate to the anemometer and boat speed sensor, amongst others. The idea is to use signal splitters to connect to a 3 port live logging interface which I have, but is has to be connected to laptop (or smaller device) to record and display the data, but as we only have AC supply when connected to a shore supply, this not really practical over a period of hours continuous logging at sea. I have identified a more sophisticated devce, the Logt Datavision, which can be programmed and run on it's own for up to 12 hours on it's internal battery, has memory and it's own dispay unit. The data can then be transferred via USB to a PC for offline analysis. On it's own, the unit can purchased for £145, which is affordable, but the obvious question is: has anyone tried anything similar and, if so, was it worth the effort and expense?