The services of a designer engineer are required. You need a device that collects coordinates as you pass the route by PESHCOM, and records them on the SSD. Must work in the field, in a sealed case, have control buttons and the possibility of hot battery replacement. The navigation unit has already been purchased, it is the u-blox C94-M8P-3 (Rover and Station). There's a lot of data, hundreds of millions of counts, and that's why SSDs.