We want to conduct a boat survey and need to track the trajectory and need to register the location and time of animal sightings. The logger should have a decent battery life, at least for 3 or more days.
Thanks @Purnendu da. 20K would be too expensive. We do not need hand held GPS, but some cheap data loggers which with give the trajectory. Also you can suggest if the battery life can be extended by add ons.