7/23/2019 PNA Smbolos Arq. Naval
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PNA Smbolos de Arquitetura Naval
The following symbols aply to Volume I only. The phrase stands
is understood between the symbol ansits definition.
A stands for area, generally I momento f inertia, generallyAM
area of midship section IL longitudinal moment of inertia of
waterplane
A area of waterplane IT trans!erse moment of inertia of
waterplane
A" after perpendicular irstands for trans!erse of inertia of
freesurface in a compartment or tan#
A$area of ma%imum section &if notamidships'
iLlongitudinal moment o f inertia of freesurface in a
compartment or tan#
( ma%imum molded breadth )( height of ( abo!e the baseline
( center of buoyancy )* height of * abo!e the baseline
(+...n changed positions of center of buoyancy )M height of M
abo!e the baseline
(L molded baseline )ML height of MLabo!e the baseline
(Mtrans!erse metacentric radius, or heigh ofM abo!e (. # radius
of gyration
(MLlongitudinal metacentric radius, or heighof MLabo!e (.
L length, generally
b width of a compartment or tan# L length of ship
Lcenterline- a !ertical plane throughcenterline
L" length of parallel body
( bloc# coefficient, L(T L/ length of run
0 drag coefficient, 0 1 2AV3 L"" length between
perprndiculars
Mmidships section coefficient, A 4T- addedmass.
L5A length o!erall
" prismatic coefficient AM L LL length od designed load of
waterline
V!olumetric coefficient
Llenght of a wa!e crest to crest
V" !ertical prismatic coefficient A T L( longitudinal position
of center of buoyancy
" waterplane area coefficient A L( L6 longitudinal position of
center of flotation
0 molded depth L* longitudinal position of center of gra!ity
0 diameter, generally LL load, or design, waterline
0 cumulati!e damage function l length of a compartment or
tan#
0L
designed load waterlineM moment, generally
0T
deadweightM( bending moment
6center of flotation ¢er of gra!ity ofwaterplane'
M trans!erse metacenter
67 efecti!e freeboard, flooded ML longitudinal metacenter6"
forward perpendicular M8 torcional moment
6 fresh water MT trimming moment
* center of gra!ity of ship9s mass M wa!e:induced bending
moment
*+...n changed positions of center of gra!ity MT moment to trim
+ cm
*Mtrans!erse metacentric height- height ofM abo!e *
MTI moment to trim + in.
*M7 effecti!e metacentric height, flooded m mass, generally
*MLlongitudinal metacentric height- height ofML abo!e *
mtrans!erse metacentric of li;uid in a tan# orcompartment
*
