Hi Andy, Thanks for replying. Looking forward to your email once the code is restructured and available. We are looking at the following: (a) Detection of dynamite fishing - known to occur along some rivers here (b) Detection of moving vehicles (diesel engined typically) - to make an event log of movements at remote locations. (eg. illegal sand mining is almost always with a lorry moving at night) With (a) ideally we would need to be able to make an approximate location estimate. Perhaps some triangulation possibilities exist. But this is probably the next step. Arvind