Next message: Zed: "Re: lv-ab: Interesting site: big waves"
I've often toyed with the idea of a boat motion predictor. With modern
sensors and computer technology it would not be difficult to feed the boat
motion into a Fourier Analysis program that would identify all the
individual intersecting wave motions. Having identified them, despite the
random appearance of the boat motion, the future motions would be
predictable by projecting each of the component waves and you could come up
with a moving graph that showed motion for the previous few minutes and
predicted motion for the next 5 minutes or so. I see no reason why it would
not be quite accurate in its predictions since the underlying component
waves are quite steady even though all mixed together they appear random.
But anyone who has been offshore in bad weather will recognize that the
motion goes through repetitive sequences.
I've known times in rough seas where I had to go on deck and being able to
look at the graph and see out 5 to 10 minutes into the future motion to pick
out the best timing seems like useful information. The sensor input could
be a USB plug in to your computer and the past/future boat motion could then
be plotted on the screen. Total cost would be very reasonable for the
sensor and the Fourier Analysis software needed has been available for 40+
years so it would only need to be adapted to the application.
It could also see a rogue wave (which is really a synchronization of the
existing waves where they all reach the peak at the same time) and give you
an advance warning so you can put the cover back on your cup of hot tea.
Regards,
Ann-Marie Foster,
----- Original Message -----
From: Wayne
To: Live-Aboard at Crux dot Astro. Utoronto. Ca
Sent: Wednesday, November 15, 2006 2:13 PM
Subject: lv-ab: Interesting site: big waves
http://tinyurl.com/ykscbo
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