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In a message dated 3/14/2010 3:29:50 P.M. Pacific Daylight Time,
hc.fulton@gmail.com writes:
I think it would be worth trialing. Some of the psubs I've seen have a little "fish finder" on them, mostly to
show bottom profile and depth.They work on the "slice" method and the profile is
a "built-up" picture from several signals. I think the side scan device is the
same except looking sideways, Right ? Don't they take a "slice" and by adding
all the slices together a picture is generated showing the echo's.
I know a regular "fish finder" can be had pretty cheaply, although like
every thing, you get what you pay for. A friend has one that he paid $30 for.
Not too fancy but it definitely shows fish from his little boat, and a bottom
profile. It seems to me that he said it has a maximum depth reading of 300 feet.
Like I said it's a cheap one and the screen on it is only about 3" X 4". He uses
it off the coast here and the water gets deep pretty quick but he can tell when
the bottom drops away like over a shelf, can see big boulders, gullies, and of
course fish if there's a big one or several in a school. He's got enough
experience with it that he can tell if it's kelp or rocks etc.
A steel sub should be easy if you know how to interpret the picture.
Frank D.
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