DCASE UNIT 4
B - ANS-Breadth / width of compartment (ft)
BM - ANS-metacenteic radius (ft)
d - ANS-Distance weight is add/menoved from centerline of ship or horizontal distance
weight is shifted (ft)
D - ANS-Depth of flooding watwr (ft)
GG1 - ANS-Vertical movement of ship's center of gravity (ft)
GG2 - ANS-Horizontal movement of ship's center of gravity (ft)
GG3 - ANS-Free surface correction virtual rise of gravity (ft)
G3G5 - ANS-Free communication correction virtual rise in gravity (ft)
GM - ANS-Metacentric height (ft)
GZ - ANS-Ship's righting arm (ft)
KG0 - ANS-Original height of the ship's center of gravity (ft)
KG1 - ANS-New height of the ship's center of gravity
KGa - ANS-Assumed height of the ship's center of gravity
Stability - ANS-The tendency of a ship to rotate one way or the other (to right itself)
Initial stability - ANS-The stability of the ship in the range from 0degrees to 7/10degrees
3 parts of FCE - ANS-1. Compartment is open to the sea
2. Compartment is partially flooded
3. Compartment is off-centerline
3 basic conditions which may cause the ship to have a permanent list - ANS-1. G
moved off centerline
, 2. -GM
3. Combination of both
Corrections for G off centerline - ANS-1. Determine cause if list
2. Shift weight to high side
3. Add weight to high side / remove weight from low side
Causes of -GM - ANS-Removal of low weight
Addition of high weight
Shifting weight up
FSE
FCE
Corrections for -GM - ANS-Eliminate FSE/FCE
add weight low / symmetrically
Remove weight high / symmetrically
Move weight down / symmetrically
Limitations to ship's design criteria - ANS-1. Limiting draft marks not submerged (prior to
damage)
2. No abnormal topside weight
3. Liquid loading instructions are followed
4. Watertight integrity is maintained
Cold weather bill responsibly - ANS-1LT / EO
Types of sinkage - ANS-Bodily
Capsizing
Plunging
Breaking up
Flooding effects diagram - green - ANS-Flooding will improve stability
Flooding effects diagram - pink - ANS-Flooding will decrease stability
Flooding effects diagram - yellow - ANS-Flood solid to improve stability
Flooding effects diagram - white - ANS-Negligible stability change when flooded
Liquid loading diagram - ANS-Depicts compartments & tanks:
B - ANS-Breadth / width of compartment (ft)
BM - ANS-metacenteic radius (ft)
d - ANS-Distance weight is add/menoved from centerline of ship or horizontal distance
weight is shifted (ft)
D - ANS-Depth of flooding watwr (ft)
GG1 - ANS-Vertical movement of ship's center of gravity (ft)
GG2 - ANS-Horizontal movement of ship's center of gravity (ft)
GG3 - ANS-Free surface correction virtual rise of gravity (ft)
G3G5 - ANS-Free communication correction virtual rise in gravity (ft)
GM - ANS-Metacentric height (ft)
GZ - ANS-Ship's righting arm (ft)
KG0 - ANS-Original height of the ship's center of gravity (ft)
KG1 - ANS-New height of the ship's center of gravity
KGa - ANS-Assumed height of the ship's center of gravity
Stability - ANS-The tendency of a ship to rotate one way or the other (to right itself)
Initial stability - ANS-The stability of the ship in the range from 0degrees to 7/10degrees
3 parts of FCE - ANS-1. Compartment is open to the sea
2. Compartment is partially flooded
3. Compartment is off-centerline
3 basic conditions which may cause the ship to have a permanent list - ANS-1. G
moved off centerline
, 2. -GM
3. Combination of both
Corrections for G off centerline - ANS-1. Determine cause if list
2. Shift weight to high side
3. Add weight to high side / remove weight from low side
Causes of -GM - ANS-Removal of low weight
Addition of high weight
Shifting weight up
FSE
FCE
Corrections for -GM - ANS-Eliminate FSE/FCE
add weight low / symmetrically
Remove weight high / symmetrically
Move weight down / symmetrically
Limitations to ship's design criteria - ANS-1. Limiting draft marks not submerged (prior to
damage)
2. No abnormal topside weight
3. Liquid loading instructions are followed
4. Watertight integrity is maintained
Cold weather bill responsibly - ANS-1LT / EO
Types of sinkage - ANS-Bodily
Capsizing
Plunging
Breaking up
Flooding effects diagram - green - ANS-Flooding will improve stability
Flooding effects diagram - pink - ANS-Flooding will decrease stability
Flooding effects diagram - yellow - ANS-Flood solid to improve stability
Flooding effects diagram - white - ANS-Negligible stability change when flooded
Liquid loading diagram - ANS-Depicts compartments & tanks:
