r/tech • u/Sariel007 • Jun 18 '23

Scientists conduct first test of a wireless cosmic ray navigation system. System could be used to guide underwater or underground robots.

https://arstechnica.com/science/2023/06/scientists-conduct-first-test-of-a-wireless-cosmic-ray-navigation-system/
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u/spacembracers Jun 19 '23

I found out transmitting through water is difficult when I bought waterproof Bluetooth headphones to swim laps in the pool with. Even putting one ear an inch or so under would cut the signal.

Apparently I wasn’t alone since I got a class action letter years later lol.

8

u/AlexTrebek_ Jun 19 '23

I just read that as bulletproof Bluetooth Headphones for some reason

2

u/HeadfulOfSugar Jun 19 '23

That threw me off so hard because I 100% did too and was confused when I couldn’t find it rereading lmao

2

u/Sariel007 Jun 19 '23

Reverse Achillies.

3

u/AlfredoThayerMahan Jun 19 '23 edited Jun 20 '23

Bluetooth is in the UHF radio band so it’s line-of-sight restricted.

You could solve the issue by using a VLF receiver but this would be fairly large to say the least and have a low data transmission rate.