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8/19/2019 Ship Theory Lines Plan Presentation
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SHIP THEORY
Basics Of ship geometry : Lines Plan
By Jishnu Saji ,
Dept. Of Naval Architecture & Ship Building SN!"#
$erala %ndia
8/19/2019 Ship Theory Lines Plan Presentation
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NO# :
• his ppt covers the 'asics of ship theory (ithlines plan and the very 'asics of ship geometryonly (hich % had undergone during my )rstcourse of naval architecture recently .
• So it is recommended to read te*t'oo+s formore +no(ledge.
• Some te*t'oo+s % (ould recommend are :,. Basic Ship heory -olume ,. Principles Of Naval Architecture -ol ,
• /any Of the Pictures in this ppt is ta+en frominternet courtesy is e*tended to the sources.
8/19/2019 Ship Theory Lines Plan Presentation
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LINES PLAN
• Lines Plan is a 0d scaled representation of the 10D
comple* form of the ship through descriptive geometry.• VIEWS:
1.Pro)le.Body plan
!.2alf 'readth plan
8/19/2019 Ship Theory Lines Plan Presentation
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1. PRO"ILE
: Pro3ection of the ship on a longitudinal verticalplane
: Stations are vertical lines
: Stations are e4ually spaced
: Num'ering of stations can 'e 5 to ,5 or 5 to 5 : Num'ering starts from aft
: 6aterlines are hori7ontal lines
: 6aterlines are mar+ed as 6L, 6L etc.
: 6aterlines are e4ually spaced
: Buttoc+s are curvilinear
: Buttoc+s are mar+ed as B$, B$%% etc.
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Actual Pro3ection Of Pro)le vie(
8/19/2019 Ship Theory Lines Plan Presentation
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. 2AL8 B9#AD2 PLAN
: Pro3ection of the ship on a longitudinal hori7ontalplane
: Dra(n 'elo( the pro)le vie(
: Stations are mar+ed as vertical lines
: Buttoc+s are dra(n parallel to centerline : Buttoc+s are straight lines e4uidistant from thecenterline
: 6aterlines are curvilinear
: Only half the pro3ection (ith respect to centerline is
dra(n
: No. of (aterlines in pro)le and half 'readth plan issame
: Diagonals are dra(n on the other free half
8/19/2019 Ship Theory Lines Plan Presentation
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half 'readth plan of ship
8/19/2019 Ship Theory Lines Plan Presentation
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1. BOD PLAN
: Pro3ection of the ship on a transverse plane
: Dra(n on the right side of pro)le
: 6aterlines are hori7ontal
: Buttoc+s are vertical lines
: he centerline is mar+ed : B$ % is closer to centerline
: Stations are curvlinear
: Stations from middle to for(ard are dra(n on theright side
: Stations from aft to middle are dra(n on the left side
: otal num'er of stations in all vie(s is the same
: Diagonals are dra(n as inclined lines
8/19/2019 Ship Theory Lines Plan Presentation
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A computer generated Body Plan
8/19/2019 Ship Theory Lines Plan Presentation
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Lines Plan
8/19/2019 Ship Theory Lines Plan Presentation
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#SES AN$ "#N%TIONS O" LINESPLAN
Lines Plan is used for the calculation of the follo(ing:
• 2ydrostatic calculations
• "apacity calculations
• rim calculations
• 8looding calculations
• "ross curves of sta'ility calculations
• 8airing and o;set reading
• Launching calculations
• 9esistance calculations
• /odel ma+ing
• "alculation of hydrodynamic derivatives
• "alculation o5f hydrodynamic derivatives
• "alculations of 'ending moment shearing force etc.
• Shell e*pansion dra(ing.
8/19/2019 Ship Theory Lines Plan Presentation
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O""SET TABLE
%t is a rectilinear ta'ulation of the follo(ing:
• he heights a'ove 'ase line each section(here it is crossed 'y a 'uttoc+ line.
• he half 'readths at each section (herethey are crossed 'y (aterline.
==========================================
#se an& 'un()i*ns O' O+se) Tale• 8or lofting
• As input to computers for fairing andfurther calculations
8/19/2019 Ship Theory Lines Plan Presentation
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A typical O88S# ABL#
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THAN- YO#