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Thread: Lead line

  1. #11
    Join Date
    Jun 2007
    Location
    Home: North West, Boat: The Clyde
    Posts
    3,763

    Default Re: Lead line

    Quote Originally Posted by tjbrace View Post
    It came with the boat, unused by me.
    Thinking of using the weight as part of an anchor buoy.
    Sounds like a good idea (and probably worthy of another spin-off thread). I came into sailing from diving and we always deployed the shot line (buoyed line from surface to sea bed, usually within the wreck field) "top tensioned". The line goes through a ring at the bottom of the buoy and falls towards the sea bed by a small weight on the end of the line, a couple of meters longer than water depth. I use this technique to keep my anchor buoy / tripping line vertical. For weight, I use lead melted into a bean can with cast-in eye. Using the lead line weight might work if the line is light.

  2. #12
    Join Date
    May 2008
    Location
    Returned to South Coast from West Coast of Scotland.
    Posts
    1,808

    Default Re: Lead line

    Yes, I use a lead line now and again, possibly two or three times a year. Mostly to check the sea bed material in an anchorage or to check if it is steeply shelving as that can affect whether your anchor holds or slips down the slope. To me it is an amazing bit of kit as you can "feel" the type of material on the sea bed just by the vibrations coming up the string. I even searched the sea bed for the remains of a wreck in one anchorage (as we wanted to avoid it in case the anchor got caught) and found the remains of the steel deck and hull 7 or 8 meters below the dinghy.

  3. #13
    Join Date
    Aug 2010
    Location
    Bristol
    Posts
    1,119

    Default Re: Lead line

    Used regularly to check keel offset on new boats or for new echo sounders.

    Used regularly when echo sounder plays up in the shallow muddy waters of the Upper Bristol Channel where a million gallons of slurry pass up and down over the "ground" twice a day and finding routes through can be interesting. Depth gauge can read double by second reflection of pulse in shallow water - dangerous if not spotted. Depth can read low - say 2m - by echo pulse bouncing off the slurry thickening in deeper water - frightening if one is slightly unsure of position or current state of the banks. Or gauge can give up and state "error" which is unnerving at least.
    A boat is for going places

  4. #14
    Join Date
    Oct 2014
    Location
    Benfleet, Essex/Keswick, Cumbria
    Posts
    1,928

    Default Re: Lead line

    noelex, thats a great idea!!

  5. #15
    Join Date
    Jul 2005
    Posts
    3,395

    Default Re: Lead line

    Quote Originally Posted by steve yates View Post
    noelex, thats a great idea!!
    Thanks .

  6. #16
    Join Date
    Jul 2001
    Location
    Lorient, just back from a second round Atlantic trip
    Posts
    3,600

    Default Re: Lead line

    Like others, I use it mainly from the dinghy. I often put a mark on the required minimum depth and motor with the dinghy all around while feeling if it hits something: I had one with a small lead weight say 1kg but the resistance while moving in the water made the rope go all slanted so I changed with a proper one weighing a few kg which is a lot better.
    oh no, yet another sailing blog
    http://sybrancaleone.blogspot.com/

  7. #17
    Join Date
    Sep 2001
    Location
    Me - Zumerzet Boat - Wareham
    Posts
    12,397

    Default Re: Lead line

    As I posted on the other thread
    Having a bilge keel, I actually use my lead line, mainly when I anchor up an estuary and expect to dry out.
    I drop it off the beams to make sure I get no nasty surprises when the water disappears.
    MontyMariner.co.uk
    Facilitated by AWESEM WP Agency

  8. #18
    Join Date
    Mar 2007
    Location
    Atlantic
    Posts
    21,781

    Default Re: Lead line

    I used my lead line sounding around an anchorage in the US Virgin islands. My rotating neon sounder was having a tantrum.
    Ever since its been a brill name drop boasty thing!

  9. #19
    Join Date
    May 2008
    Location
    Scotland
    Posts
    2,137

    Default Re: Lead line

    Occasionally when moored on a slope, I'll check the aft end with a lead line ( thin marked cord - big fishing weight) to find out what is going on.
    I know my keel offset accurately, but what happens 7metres aft is often guesswork otherwise!

  10. #20
    Join Date
    Jul 2008
    Location
    East coast UK. Mostly. Sometimes the Philippines
    Posts
    10,408

    Default Re: Lead line

    Quote Originally Posted by capnsensible View Post
    I used my lead line sounding around an anchorage in the US Virgin islands. My rotating neon sounder was having a tantrum.
    Ever since its been a brill name drop boasty thing!
    Lead line name drop:


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