As mentioned in a previous thread on this topic - they don't have to register su... | Hacker News

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		comrade1 on June 2, 2015 \| parent \| context \| favorite \| on: FBI operating fleet of surveillance aircraft flyin... As mentioned in a previous thread on this topic - they don't have to register surveillance blimps, tethered or free-flying. Based on altitude I think.

fnordfnordfnord on June 2, 2015 [–]

They do, they appeared on sectionals as obstacles https://www.federalregister.gov/articles/2010/10/28/2010-272...

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