Chief Mate Stability Nomenclature

Question 1

M

Answer 1

Metacenter

Question 2

B

Answer 2

CENTER OF BUOYANCY. Point where all upward forces act

Question 3

G

Answer 3

CENTER OF GRAVITY. Point where all downward forces act

Question 4

K

Answer 4

KEEL. (Height of the…)

Question 5

GM

Answer 5

Metacentric Height

Question 6

BM

Answer 6

Metacentric Radius

Question 7

Ø

Answer 7

Angle of list or Heal

Question 8

B1

Answer 8

Center of buoyancy shifted

Question 9

GZ

Answer 9

Righting Arm

Question 10

GG’

Answer 10

Shift of Center of Gravity - Due to the shift of weight in the vertical, athwartship or Longitudinal direction. Weight added, removed or shifted.

Question 11

GGo

Answer 11

Virtual rise of G due to FREE SURFACE CORRECTION.

Question 12

KB

Answer 12

Height of the CENTER OF BUOYANCY. Center of the underwater volume acting upward.

Question 13

KG

Answer 13

Height of the CENTER OF GRAVITY. Center of weights acting downward.

Question 14

KM

Answer 14

Height of the METACENTER

Question 15

AWP

Answer 15

Area of Water Plane

Question 16

FWA

Answer 16

Fresh Water Allowance

Question 17

BWA

Answer 17

Brackish Water Allowance

Question 18

TPI

Answer 18

Tons Per Inch Immersion

Question 19

MT1

Answer 19

Moment to Trim One Inch

Question 20

p or CW

Answer 20

Waterplane coefficient. Ratio of the vessels water plane area.

Question 21

k

Answer 21

factor based on p(CW) or b(CB). Block or waterline coefficient.

Question 22

b or CB

Answer 22

Block Coefficient. Ratio of the underwater Volume of the vessel below the waterline

Question 23

Angle of Loll

Answer 23

Is the state of a ship that is unstable when upright.

Question 24

Transverse

Answer 24

or athwartship. Direction from port to stbd / stud to port

Question 25

Longitudinal

Answer 25

Fwd or aft direction

Question 26

Centerline

Answer 26

CL. Vertical plane that runs fore and aft down the vessel

Question 27

Baseline

Answer 27

BL. Horizontal plane that runs fore and aft at the keel. All vertical measurements are from the baseline.

Question 28

Waterline

Answer 28

WL or W1L1. Where the surface of the water touches the vessels hull

Question 29

Area of Waterplane.

Answer 29

AWP. Longitudinal Center of Floatation (LCF). Area of the plane defined by all intersections of the ships hull. “footprint”

Question 30

Length Between Perpendiculars

Answer 30

LBP. Length between FP and AP

Question 31

AP

Answer 31

Aft Perpendicular

Question 32

FP

Answer 32

Fwd Perpendicular

Question 33

35ft^3 equals

Answer 33

2240 lbs or 1 long ton Salt Water

Question 34

36ft^3 equals

Answer 34

2240 lbs or 1 long ton Fresh Water