Snapping shrimp in dagger board crash trunk. Serious please

Discussion in 'Multihulls' started by pbmaise, Nov 12, 2012.

  1. pbmaise
    Joined: Jul 2010
    Posts: 115
    Likes: 5, Points: 18, Legacy Rep: 80
    Location: Cebu the Philippines

    pbmaise Senior Member

    Okay I have a problem. A loud problem. Unless someone can come up with a better idea I have snapping shrimp living in one of my dagger board trunks.

    This is an extremely loud snapping noise, and tends to be more at night. There is zero zip nada nothing making this noise in the other dagger board trunk.

    Further, I have been to Phuket where I hear small shrimp all around. This is very different. It is like someone is lighting small fire crackers off in my engine room.

    Oh yes, it is a trimaran. And the dagger board trunk passes through the engine room.

    The board is stuck. Way stuck. Never put a dagger board in the cockpit of a boat where all the dirt washes in.

    Ideas to stop them?
     
  2. hoytedow
    Joined: Sep 2009
    Posts: 5,402
    Likes: 194, Points: 73, Legacy Rep: 2489
    Location: North of Cuba

    hoytedow Wood Butcher

    Peanut oil in dagger board trunk will smother them.
     
  3. PAR
    Joined: Nov 2003
    Posts: 19,133
    Likes: 471, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

  4. pbmaise
    Joined: Jul 2010
    Posts: 115
    Likes: 5, Points: 18, Legacy Rep: 80
    Location: Cebu the Philippines

    pbmaise Senior Member

    Peanut oil...I guess I can use palm oil

    Good idea on the peanut oil. Palm oil much cheaper here. I've tried to flush them out with fresh water and ran fresh water into the trunk for several days but they still survived.

    Since the board is essentially stuck midway down and I can't bring it up or down a cover over it in light fiberglass that can be removed is the route I'm thinking about for a cover.

    I spent about 2 solid weeks trying to get it free and concluded there was one bolt or large metal piece stuck on one side of the board about 3 feet below the deck level. I tried pounding the bolt down. Tried to cut it in half with a hack saw blade with an extension. I even tried looping a metal cable around one side and then bringing it up the other and pulling it up.

    Only result was frustration. Its not a critical item for my boat so it becomes just one of the things I get to live with. Thanks
     
  5. hoytedow
    Joined: Sep 2009
    Posts: 5,402
    Likes: 194, Points: 73, Legacy Rep: 2489
    Location: North of Cuba

    hoytedow Wood Butcher

    Copper sulfate is also very toxic to crustaceans.
     
  6. PAR
    Joined: Nov 2003
    Posts: 19,133
    Likes: 471, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Yep, seal them in and a little poison will fix the problem.
     
  7. gonzo
    Joined: Aug 2002
    Posts: 13,573
    Likes: 375, Points: 93, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    Barnacles make a snapping sound.
     
  8. Frosty

    Frosty Previous Member

    Ha ha I get that. In these tropical waters --and I am just south of you in Langkawi it happens all the time. I was wakened by them last night and the deeper you go in the boat the worse it gets.

    I dived on my boat this afternoon for that reason, I though I had barnacles, I had none, I guess the barnacles on the dock must have been having a party last night.

    I think too that it is barnacles. If your in a marina its on the dock.
     
  9. cavalier mk2
    Joined: Mar 2010
    Posts: 2,086
    Likes: 40, Points: 48, Legacy Rep: 214
    Location: Pacific NW North America

    cavalier mk2 Senior Member

    Could it have anything to do with the stuck board? If something in there is binding any waves would cause things to rock and crunch.
     
  10. Richard Woods
    Joined: Jun 2006
    Posts: 2,179
    Likes: 145, Points: 63, Legacy Rep: 1244
    Location: UK, USA and Canada

    Richard Woods Woods Designs

    The only times I've had a stuck board was when I got a short piece of floating polyprop rope caught between the board and case just as I was raising the board. I did get the board up both times though using a long lever

    I have also heard the (sometimes loud) snapping sound. I always assume it is polyestermites but have been told it is the noise shrimp make when accelerating (water jet cavitation?)

    Richard Woods of Woods Designs

    www.sailingcatamarans.com
     

  11. PAR
    Joined: Nov 2003
    Posts: 19,133
    Likes: 471, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Centerboards will steel armatures can swell up and wedge themselves in a case.
     
Loading...
Similar Threads
  1. kelldog
    Replies:
    25
    Views:
    3,427
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.