Length overall#LOH
{{short description|Maximum length of a vessel's hull measured parallel to the waterline}}
{{for multi|the measurement of an ammunition cartridge|Overall length|"o/a" as an abbreviation of "operating as"|Trade name}}
File:Ship length measurements.svg
Length overall (LOA, o/a, o.a. or oa) is the maximum length of a vessel's hull measured parallel to the waterline. This length is important while docking the ship. It is the most commonly used way of expressing the size of a ship, and is also used for calculating the cost of a marina berth
{{cite web |url=http://www.mosquitocreekmarina.com/moorage.html |title=Boat Moorage |publisher=Mosquito Creek Marina |access-date=2009-07-13}} (for example, £2.50 per metre LOA).
LOA is usually measured on the hull alone.{{cite web |url=http://www.westlawn.edu/student_center/definitions.asp |title=Definitions of: Boat, Yacht, Small Craft, and Related Terms |publisher=Westlawn Institute of Marine Technology |access-date=2009-07-13 |archive-date=2010-01-23 |archive-url=https://web.archive.org/web/20100123025556/http://www.westlawn.edu/student_center/definitions.asp |url-status=dead }} For sailing ships, this may exclude the bowsprit and other fittings added to the hull. This is how some racing boats and tall ships use the term LOA.
{{Cite web |url=http://www.sailtraininginternational.org/uploads/images/1233149882328_0.6089951864523053.pdf |title=Racing & Sailing Rules and Special Regulations |year=2008 |page=2 |publisher=Sail Training International |url-status=dead |archive-url=https://web.archive.org/web/20090902233806/http://www.sailtraininginternational.org/uploads/images/1233149882328_0.6089951864523053.pdf |archive-date=2009-09-02 }} However, other sources may include bowsprits in LOA.{{cite book |url=https://books.google.com/books?id=9_7ycOuv6a4C&q=LOA+length+overall+LOD+donald&pg=PA64 |title=Dictionary of Nautical Acronyms and Abbreviations |last=Launer |first=Donald |publisher=Sheridan House, Inc |year=2006 |page=64 |isbn=978-1-57409-239-4}} Confusingly, LOA has different meanings.
{{cite book |url=https://books.google.com/books?id=QgMRudqoLGQC&q=length+overall+unambiguously+tons+gross&pg=PR19 |last=Schäuffelen |first=Otmar |title=Chapman great sailing ships of the world |publisher=Hearst Books |year=2005 |page=xix |isbn=978-1-58816-384-4}}{{cite web |url=http://www.wilhelmsen.com/about/press/Pages/Glossary.aspx |title=Glossary |publisher=Wilh. Wilhelmsen ASA |access-date=2009-07-18 |url-status=dead |archive-url=https://web.archive.org/web/20090524071747/http://www.wilhelmsen.com/ABOUT/PRESS/Pages/Glossary.aspx |archive-date=2009-05-24 }} "Sparred length", "Total length including bowsprit", "Mooring length" and "LOA including bowsprit" are other expressions that might indicate the full length of a sailing ship.
LOD
Often used to distinguish between the length of a vessel including projections (e.g. bow sprits, etc.) from the length of the hull itself, the Length on Deck or LOD is often reported. This is especially useful for smaller sailing vessels, as their LOA can be significantly different from their LOD.{{cite book |url=https://books.google.com/books?id=9_7ycOuv6a4C&q=LOA+length+overall+LOD+donald&pg=PA64 |title=Dictionary of Nautical Acronyms and Abbreviations |last=Launer |first=Donald |publisher=Sheridan House, Inc |year=2006 |page=64 |isbn=978-1-57409-239-4}}{{cite web |url=http://www.seatalk.info/cgi-bin/nautical-marine-sailing-dictionary/db.cgi?db=db&uid=default&FirstLetter=l&sb=Term&view_records=View+Records&nh=3 |archive-url=https://web.archive.org/web/20070713005004/http://www.seatalk.info/cgi-bin/nautical-marine-sailing-dictionary/db.cgi?db=db&uid=default&FirstLetter=l&sb=Term&view_records=View+Records&nh=3 |url-status=usurped |archive-date=July 13, 2007 |title=The Dictionary of English Nautical Language |publisher=www.seatalk.info |access-date=2009-07-13}}
LOH
In ISO 8666 for small boats, there is a definition of LOH, or length of hull.{{cite web |url=http://www.hawaii-marine.com/templates/Products/ASail-e/description.htm |title=Advanced Sailboat Parameter Calculations & Checks |work=Product description |publisher=Hawaii Marine Templates |access-date=2009-07-18}} This may be shorter than a vessel's LOA, because it excludes other parts attached to the hull, such as bowsprits.
LWL
Another measure of length is LWL (loaded waterline length) which is more useful in assessing a vessel's performance. In some cases (particularly old yachts or vessels with bowsprits) LWL can be considerably shorter than LOA.
See also
References
= Citations =
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= Sources =
{{Refbegin}}
- {{cite book |last=Hayler |first=William B. |author2=Keever, John M. |title=American Merchant Seaman's Manual |year=2003 |publisher=Cornell Maritime Pr |isbn=0-87033-549-9 }}
- {{cite book |last=Turpin |first=Edward A. |author2=McEwen, William A. |title=Merchant Marine Officers' Handbook |edition=4th |year=1980 |publisher=Cornell Maritime Press |location=Centreville, MD |isbn=0-87033-056-X }}
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{{Ship measurements}}