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Old 14-01-2016, 10:20   #16
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Re: How not to read bridge clearance

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Originally Posted by jackdale View Post
The eyes can fool you.

I'm sorry, I'm entirely a newbie, here, but I never imagined that anyone would try to estimate the height of a bridge by eye. Or trust the published elevations, either, given how much the water level can change.

Calculating elevation given distance and angle is trivial. Are there really many people who'd risk an expensive boat because they couldn't be bothered?
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Old 14-01-2016, 10:42   #17
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Re: How not to read bridge clearance

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I'm sorry, I'm entirely a newbie, here, but I never imagined that anyone would try to estimate the height of a bridge by eye.
It is amazing how many folks do not read charts. Just like the skipper of that cat in the video.

Judging distances and heights at night is very difficult.
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