Anchor Sizing

Discussion in 'Boat Design' started by CGWILSON, Jun 19, 2003.

    Joined: Jun 2003
    Posts: 3
    Likes: 0, Points: 1, Legacy Rep: 10
    Location: Marryland

    CGWILSON New Member

    Is there a practical way to determine the size of an anchor required for a vessel dependant on current speed?:?:
  2. Peter_T
    Joined: May 2003
    Posts: 38
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Gulf Coast

    Peter_T Junior Member

    Either you find a rule book on classing yachts to take advantage of the equipment table, or you can use a direct method to assess the frontal wind/current load with side drag using an oblique windage at 30 degrees from the boat's heading. Often people and Class. omit the drag force from horizontal surfaces. You may added these for adequacy of the hawser system.

    Hawsers should be suitable to withstand the severe weather load, if they are intended to face the storm, else, use half the storm intensity as equivalent to severe inland wind and current strength.

    Having determined the horizontal hawser load, convert this to fit with the depth of water and the chain scope, using catenary principal. Anchors can be traced for holding power.

  3. Guest

    Guest Guest

    There are too many variables. How good the bottom is would be a key variable. Anchor size is determined by manufacturer's recommendations, which vary with the boat's size. Anchor type depends on the type of bottom. See a West Marine catalog.

    Go to, and find the product advisor section.

    People who plan to do serious cruising generally select the next size up from that suggested by manufacturers.

    Also, get a copy of "Chapman Piloting: Seamanship & Boat Handling"

    Tim Dunn
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.