You’re lost. Even worse, there’s no cell signal. The last thing keeping you from fully freaking out is that little blue dot — the universal sign that, somewhere up above, a GPS satellite has eyes on you.

But what if you don’t even have that?

Kanwar Singh thinks he’s got a solution. For the past few years he’s been building a vision-based navigation system with his startup Skyline Nav AI . The so-called Pathfinder software can look at almost anything — buildings, tree-lined roads, even aerial views — and quickly match it to a database and generate real-time navigation.

That could be useful if you’re in a big city with tall buildings, or on a canyon road surrounded by mountains, where line-of-sight to a GPS satellite is blocked. (Singh knows this all too well, too: in 2014, his friend

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