Calculate Vessel Gross Tonnage

Discussion in 'General Discussion' started by Kameroo, Jan 9, 2009.

  1. Kameroo

    Kameroo Member

    Feb 1, 2007
    Louisville, KY
    12' Kayaks
    I know documented vessels have Vessel GT on the paperwork. Is there a formula for computing this number on non-documented boats? This is for my USCG Small Vessel Sea Service Forms.

    Thanks in advance!
  2. fwebster

    fwebster Well-Known Member TECHNICAL Contributor PLATINUM Sponsor

    Oct 6, 2006
    Middle Tennessee ; Panama City Beach, FL
    1996 450DA
    3116 Caterpillars
    Yes, the old USCG doc forms have the formula, but it isn't for the faint of heart or calculator. I think I have a copy at home........I'm boating in Fla this week (74 degrees and sunny). If you can't locate it, I'll look for it when I get home. I think I still have your email address but will shoot you a PM if I can't find it.
  3. missnmountains

    missnmountains Member

    Dec 12, 2007
    2008 58 Sedan Bridge
    900 Man
    L x B x D (depth not draft) x .67 (for power) or .5 (for sail)100

    Length time Breadth times Depth
  4. Woody

    Woody Well-Known Member PLATINUM Sponsor

    Nov 20, 2007
    N. Wisconsin/Lk Superior
    2005 420DA
    Cummins 6CTA8.3
    A link to form for simple GT calculations

    Also helpfull, see pdf #4 simplified tonnage guide
    Last edited: Jan 10, 2009
  5. Kameroo

    Kameroo Member

    Feb 1, 2007
    Louisville, KY
    12' Kayaks
    Thanks. I think I'll try a different approach on some boats I operated, by just asking others what their cert. of doc. says.

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