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<blockquote data-quote="tetrasodium" data-source="post: 8581396" data-attributes="member: 93670">100feet up is very much a nontrivial bump to vision. The &quot;crows nest&quot; on sailing ships was well under a hundred feet up, <a href="https://www.quora.com/Why-do-crows-nests-on-ships-increase-vision-range#:~:text=It%20is%20the%20same%20as,of%20an%20aircraft%20in%20flight.&amp;text=If%20you%20are%20standing%20on,the%20horizon%2018%20km%20away." target="_blank">here</a> is a great post explaining it[spoiler]If you are standing on the deck your eye level (5 m) gives you a horizon 8 km away - if your eye level is 25 m (in the crow's nest) you will see the horizon 18 km away.below O is the observer (you) and v is your height over sea level. Use Pythagora's theorem to calculate.[ATTACH=full]153986[/ATTACH][/spoiler]25m is only about 82ft so the familiar is even better &amp; can easily do circles at that height&nbsp; while staying within 100ft</blockquote>

[QUOTE="tetrasodium, post: 8581396, member: 93670"] 100feet up is very much a nontrivial bump to vision. The "crows nest" on sailing ships was well under a hundred feet up, [URL='https://www.quora.com/Why-do-crows-nests-on-ships-increase-vision-range#:~:text=It%20is%20the%20same%20as,of%20an%20aircraft%20in%20flight.&text=If%20you%20are%20standing%20on,the%20horizon%2018%20km%20away.']here[/URL] is a great post explaining it [spoiler] If you are standing on the deck your eye level (5 m) gives you a horizon 8 km away - if your eye level is 25 m (in the crow's nest) you will see the horizon 18 km away. below O is the observer (you) and v is your height over sea level. Use Pythagora's theorem to calculate. [ATTACH type="full" alt="1648005869227.png"]153986[/ATTACH][/spoiler] 25m is only about 82ft so the familiar is even better & can easily do circles at that height while staying within 100ft [/QUOTE]

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