If you are trying to find turtles’ nests and you can only have a very lightweight GPS device, we need a way to be sure the GPS only turns on when the turtle is walking, not when the turtle is swimming. Our accelerometer/gyroscope sensor can detect a swimming turtle with 99% accuracy. As for walking, the accuracy is lower. But then, as the user, you get to program about 10 different settings that determine how the sensor will inform the microprocessor regarding turning on the GPS in different scenarios. It is complicated but we are happy to explain it to you. Please email sales@telemetrysolutions.com to schedule a no pressure, informational phone call or Zoom. We’re happy to help.