Chapter 14: AGS Glossary

 

Displaced water volume

AM

Immersed area of midship section

AP

After Perpendicular - The perpendicular to the design load waterline at its intersection with the after edge of rudder post or center-line of the rudder stock.

Aqwa-Drift

Hydrodynamic response – Time domain analysis with second order wave forces

Aqwa-Fer

Hydrodynamic response - Frequency statistical analysis

Aqwa-Librium

Hydrodynamic response – System equilibrium position and dynamic stability analysis

Aqwa-Line

Hydrodynamic diffraction analysis in frequency domain

Aqwa-Naut

Hydrodynamic response – Time domain analysis with nonlinear incident wave and hydrostatic forces on instantaneous wetted surface

Aqwa

Advanced Quantitative Wave Analysis system

AS

Immersed sectional Area

AW

Amplitude of regular wave

B

Breadth (or Center of Buoyancy in hydrostatics)

BL

Baseline

BM(T)

Metacentric radius (transverse)

BML

Longitudinal metacentric radius

bubble help

This is an example of 'bubble help' or a 'hot spot'

CB

Block coefficient

CL

Centerline

CM

Midship section coefficient

COB

Center of buoyancy

COF

Center of Flotation - Centroid of Waterplane area

CP

Prismatic Coefficient (longitudinal)

CPL

Prismatic Coefficient (longitudinal)

CPV

Vertical Prismatic Coefficient

CW

Waterplane Area Coefficient

D

Depth (to uppermost continuous deck at side midships)

DISPLACE

Mass displacement (∇=ρ∇)

FP

Forward Perpendicular - The perpendicular to the designed load waterline at its intersection with the forward side of the stem

FW

Fresh water density (ρ taken as 1.000 tonne/m3)

GM(T)

Metacentric Height (transverse)

GML

Longitudinal metacentric height

GZ

Righting lever

IL

Longitudinal moment of inertia of waterplane about COF

IT

Transverse moment of inertia of waterplane about COF

K

Horizontal Plane through the baseline

KB

Height of COB above baseline

KG

Height of COG above baseline

KM(L)

Height of Longitudinal metacenter

KM(T)

Height of Transverse metacenter above baseline

KN

Righting lever with COG assumed at K

LBP

Length between perpendiculars (L in hydrostatic calculations)

LCB

Longitudinal center of buoyancy

LCF

Longitudinal center of flotation

LCG

Longitudinal center of gravity

LOA

Length overall

LPP

Length between perpendiculars (L in hydrostatic calculations)

LWL

Length on design load waterline

M

Metacenter

MCT 1"

Moment to change trim 1inch

MCT 1cm

Moment to change trim 1cm

N

Intersection of vertical through metacenter and horizontal through K on centerline

SW

Salt water density (ρ taken as 1.025 tonne/m3)

T

Draught (Draft), Wave Period

TPC

Tonnes per centimeter immersion

TPI

Tonnes per inch Immersion

VCB

Vertical center of buoyancy

VCG

Vertical center of gravity

WL

Waterline

WSA

Wetted Surface Area

Z

Intersection of vertical through metacenter and horizontal through COG