36:
101:
155:, which is determined by the length of the waterline, and can be calculated using the formula: Vmax (in knots) = square root of LWL (in feet) x 1.34. The hull speed is the speed at which the wavelength of the bow wave stretches out to the length of the waterline, thus dropping the boat into a hollow between the two waves. While small boats like canoes can overcome this effect fairly easily, heavier sailboats cannot.
159:
overhangs fore and aft. This resulted in a nominally shorter waterline, but when the boats were sailed they heeled over, pulling the sides of the overhangs into the water as well and creating a much longer effective waterline, and thereby achieving much greater speed. The first recorded use of a line (documented by New Jersey marine museum) is by the small and rather unknown naval fleet of Thomas
Jefferson.
93:
707:
158:
Since waterline length provides a practical limit for the speed of a typical sailboat, traditional rules for racing sailboats often classed boats using waterline length as a principal measure. To get around this rule, designers in the early 20th century began building racing sailboats with long
136:
protrusions that make the LOA greater than the LWL. As a ship becomes more loaded, it will sit lower in the water and its ambient waterline length may change; but the registered L.W.L is measured from a default load condition.
147:
In sailing boats, longer waterline length will usually enable a greater maximum speed, because it allows greater sail area, without increasing beam or draft. Greater beam and draft produces a larger
140:
This measure is significant in determining several of a vessel's properties, such as how much water it displaces, where the bow and stern waves occur,
151:, thereby causing higher hull drag. In particular, any "displacement" or non-planing boat requires much greater power to accelerate beyond its
288:
144:, amount of bottom-paint needed, etc. Traditionally, a stripe called the "boot top" is painted around the hull just above the waterline.
17:
744:
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200:
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57:
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763:
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116:) is the length of a ship or boat at the level where it sits in the water (the
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122:). The LWL will be shorter than the length of the boat overall (
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252:(4th ed.). Centreville, MD: Cornell Maritime Press.
247:
96:
LOA (length overall) & LWL (length at the waterline)
706:
228:
201:"Improve performance by understanding boat design"
755:
248:Turpin, Edward A.; McEwen, William A. (1980).
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282:
229:Hayler, William B.; Keever, John M. (2003).
745:
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444:Panama Canal/Universal Measurement System
80:Learn how and when to remove this message
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91:
43:This article includes a list of general
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756:
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270:
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29:
24:
250:Merchant Marine Officers' Handbook
49:it lacks sufficient corresponding
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790:
231:American Merchant Seaman's Manual
705:
34:
193:
181:
13:
1:
317:Length between perpendiculars
222:
169:Length between perpendiculars
717:. You can help Knowledge by
7:
502:Twenty-foot equivalent unit
162:
128:or LOA) as most boats have
10:
795:
700:
449:Thames measurement tonnage
607:
576:
540:
523:Builder's Old Measurement
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482:
457:
436:
423:Compensated gross tonnage
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398:
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369:Load line (Plimsoll Line)
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713:This naval article is a
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104:Detailed hull dimensions
599:Metacentric height (GM)
322:Length at the waterline
233:. Cornell Maritime Pr.
110:length at the waterline
64:more precise citations.
465:Gross register tonnage
105:
97:
558:Standard displacement
506:Intermodal containers
189:Load Waterline Length
103:
95:
18:Long at the waterline
764:Nautical terminology
470:Net register tonnage
374:Under keel clearance
205:Practical Boat Owner
568:Normal displacement
553:Loaded displacement
563:Light displacement
497:Deadweight tonnage
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98:
774:Ship measurements
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725:
695:
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656:§ Neopanamax
637:Handymax/Supramax
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298:Ship measurements
187:Note: originally
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112:(abbreviated to
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51:inline citations
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584:Inclining test
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528:Moorsom System
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312:Length overall
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149:wetted surface
125:length overall
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27:Size of a ship
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9:
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729:
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682:VLCC and ULCC
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594:Angle of loll
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418:Gross tonnage
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359:Moulded depth
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259:0-87033-056-X
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769:Shipbuilding
719:expanding it
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548:Displacement
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208:. Retrieved
204:
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117:
113:
109:
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67:
48:
668:(Qatar-max)
437:Specialized
428:Net tonnage
108:A vessel's
70:August 2013
62:introducing
779:Navy stubs
758:Categories
647:Malaccamax
223:References
153:hull speed
142:hull speed
45:references
672:Seawaymax
642:Handysize
577:Stability
406:Worldwide
390:Air draft
364:Freeboard
119:waterline
687:Yamalmax
632:Chinamax
627:Capesize
622:Baltimax
483:Capacity
163:See also
677:Suezmax
661:Péniche
652:Panamax
617:Aframax
516:Archaic
490:Current
458:Archaic
413:Tonnage
331:Breadth
210:17 July
58:improve
609:Limits
541:Weight
399:Volume
383:Height
305:Length
256:
237:
47:, but
666:Q-Max
354:Draft
347:Depth
175:Notes
134:stern
114:L.W.L
715:stub
654:and
589:List
338:Beam
254:ISBN
235:ISBN
212:2024
132:and
130:bows
760::
203:.
746:e
739:t
732:v
721:.
508:)
504:(
290:e
283:t
276:v
262:.
243:.
214:.
83:)
77:(
72:)
68:(
54:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
