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  1. #1
    Member
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    Apr 2019
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    Massachusetts
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    1

    Quabbin reservoir - image interpretation

    First time using side imaging. Humminbird Helix 7 G3N in a rented aluminum boat, an 8hp engine, with the transducer mounted by magnetically sandwiching the left side of the hull.

    The Quabbin was once a number of towns that were unincorporated and flooded in the 1930's. Are the first two images an old riverbed that I bisected?

    bA2Fn34.pngrQi3WAx.png8eV71wu.pngyI8J6A5.png

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  3. Member
    Join Date
    Feb 2018
    Location
    Michigan
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    98
    #2
    First look like a creek bed, third looks like a road to me. Don’t have any reservoirs like that around here so I’m hardly your best bet at a good answer.

  4. Member MonteSS's Avatar
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    Aug 2011
    Location
    Central Virginia
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    2,072
    #3
    You are trying to see too much to the sides. Try 3-4 times the depth.

  5. Member
    Join Date
    Jun 2012
    Location
    Valparaiso, Indiana
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    5,730
    #4
    Are you saying if you're 10 foot deep, you should set your SI at 30-40 feet? It seems like you'll miss quite a bit. Is it just because at less distance using SI you get better images?
    Quote Originally Posted by MonteSS View Post
    You are trying to see too much to the sides. Try 3-4 times the depth.

    2005 Champion 198 DC Elite
    2005 Mercury Optimax-225hp (Serial#1B073011)

  6. Member Fishysam's Avatar
    Join Date
    Oct 2016
    Location
    North Dakota
    Posts
    4,787
    #5
    yes, i may push it to 75' each side in 10' if the water conditions allow it. it will let you set up the screen to not burn out the close returns and not waste the super dark outside
    Mercury 250 proxs 2B115089