For robust underwater map-based positioning and navigation Acoustic Position SW and GPS (With integrated antenna; external antenna supported) Fully IP67 protected housing and connectors Water linked digital locator with 100m cable length Built-in wifi Supported by the BlueROV2 Advanced Remote Operated Underwater Vehicule Kit w/100m Tether & 2 Lights The Underwater GPS Developer Kit (100m) kit includes the electronics, antenna, and locator needed to get started with this underwater positioning system! This system is fully supported on the BlueROV2 and ArduSub for map-based positioning and navigation. The Underwater GPS Developer Kit includes everything you need to get started with Water Linked modules for robust underwater positioning in your system. The Master-D1 calculates the position of any Locator relative to the position of the Antenna with the APS100 technology. Combined with the integrated GPS and IMUs, it will provide the absolute GPS position of the Locator. With a small physical footprint, the kit is easily integrated into even the most compact equipment. It can be used retro-fitted to your system with the included cable, or integrated through your umbilical. 3D position data is accessed through an easy-to use API. Just power up and start exploring the underwater world! For use with the BlueROV2, it is strongly recommended getting the Water Linked Underwater GPS / BlueROV2 Integration Kit.