The March 2014 issue of Westlawn Institute's free journal The Masthead is posted

Discussion in 'Education' started by dgerr, Mar 26, 2014.

  1. dgerr
    Joined: Jul 2004
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    dgerr Senior Member

    The March 2014 issue of Westlawn Institute's free online journal, The Masthead, is now posted.

    Highlights in this edition:
    • Flags of Convenience
    • ABYC President’s Message
    • Cutting Costs for Students
    • New Textbook: Fundamentals of Resistance
    • Westlawn Profiles Luc St-Onge
    • ABYC Tech Notes: Minimum Wires Size and LED Lighting
    • Fundamentals of Batteries and Battery Management
    • On the Drawing Board: Erdevicki’s 80-ft. Power Cat
    • Orca3D Tip: Using Clipping Planes
    • We Get Mail
    • Know It All Answer: Wakeboard-Boat Tower Loads
    • Know It All Question: Trim Control
    • About The Landing School
    • News & Views
    • Masthead Archives
    • Westlawn Information


    Flags of Convenience

    It's natural to assume that a ship or boat would fly the flag of the country of its owner or the flag of its real working homeport. In fact-at least for ships and large yachts-this is seldom the case. Indeed, most ships are registered under foreign flag. Such registrations are known as flags of convenience or FOC. This is done for a number of reasons.

    New Westlawn Textbook on Principles of Resistance

    Westlawn Institute has introduced the second new textbook in three months. This new text is Principles of Resistance, Westlawn book 105a. It is part of Westlawn's Yacht & Boat Design Program in Module 1, and also in Westlawn's Elements of Technical Boat Design short course. The new Principles of Resistance Book 105a, replaces the previous version of this text and not only completely updates the previous material, but adds extensive new material, more than tripling the content and scope of the previous material.

    Fundamentals of Batteries and Battery Management
    By Steve D'Antonio

    With few exceptions, the marine battery systems found on many recreational power and sailing vessels have remained essentially unchanged for decades. There's no shame in familiarity. In fact, well-proven is an accolade to be sure when it comes to any marine equipment or design, especially those of an electrical nature.

    As common as these arrangements may be there's still a variety of design and installation details that must be considered to make them reliable, seaworthy and safe. There are also decisions to be made by the installer and user regarding redundancy, versatility and compliance with commonly accepted guidelines such as those established by the American Boat and Yacht Council (ABYC). While typically considered voluntary, depending on the vessel's use and fuel source, these guidelines may be mandated by federal agencies (gasoline-powered vessels, for instance, are required to meet a series of standards under the Code of Federal Regulations, many of which relate directly to batteries and other electrical components) or your insurer.

    Orca3D Tip - Using Clipping Planes to View a Portion of the Hull
    By Bruce Hays

    When fairing a hull, it can be helpful to view just a portion of the surface or the control net. With Rhino's Clipping Planes, it is easy to isolate as little or as much of the hull as you like. A Clipping Plane is a plane in space beyond which the model becomes invisible. Multiple planes can be used; for example, two transverse planes could be used to isolate the middle portion of a hull. But the planes don't need to be parallel to one another; one could be transverse and another parallel to the waterplanes. There is no limit to the number of Clipping Planes that you can define.

    Read the complete articles and more in this issue.
    Go to:

    New issues of The Masthead are in Internet flipping-book format, with control icons are located on the bar at the bottom of the screen

    If you prefer to read it in standard PDF format, go to the new flipping-book format and click on the download button on the bottom gray bar.

    You can click on:

    To see all back issues and read whichever one you like.

    Dave Gerr, CEng FRINA
    Director, Westlawn Institute
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