In the Arctic or Antarctic, normal sextant readings fail due to magnetic interference. GVO Navi includes a "Lunar Distance" tab. Enter the in-game time (UT) and the angle between the moon and a star; the tool calculates your exact longitude.
If the write-up touched on the network aspect (GVN), it probably discussed how they incentivize data sharing. gvo navi
: Note the tool's longevity, with community updates (like 64-bit support and C++17 migrations) keeping it viable as Windows operating systems evolve. In the Arctic or Antarctic, normal sextant readings