[benjamincburns]

Lots of other people talk about fancy GPS systems in this thread, but it's been done for far longer with much simpler, arguably more reliable technology: long poles/sticks either painted with bright high vis paint, or more recently, retroreflectors.

It reminds me a bit of the story about NASA and the gazillion dollar space pen, vs the soviet space agency and their pencils.

[jsm386]

Sure, why not a "gazillion" at this point:

> When the solution of providing astronauts with a ballpoint pen that would work under weightless conditions and extreme temperatures came about, though, it wasn’t because NASA had thrown hundreds of thousands of dollars (inflated to $12 billion in the latest iterations of this tale) in research and development money at the problem. The “space pen” that has since become famous through its use by astronauts was developed independently by Paul C. Fisher of the Fisher Pen Co., who spent his own money on the project and, once he perfected his AG-7 “Anti-Gravity” Space Pen, offered it to NASA.

Via http://www.snopes.com/business/genius/spacepen.asp

[lern_too_spel]

The Soviets used the Fisher Space Pen, too. https://www.scientificamerican.com/article/fact-or-fiction-n...

Pencils have issues with electrical systems, waste, and flammability.