stability for interview

vertical dist. from keel to waterline

deckline to respective loadline

• .        C squared
• BS =          3

•            C squared
• SWL =        18

BS = 2.5 C squared

• .                 2C squared
• SWL =               6

point through which total bouyancy of the ship is considered to act

point through which total weight of the ship is considered to act

• motion about the vessel's traverse axis
• 

• motion about the vessel's longitudinal axis
• 

total weight that the vessel is allow to carry

deckline to waterline

• length between perpendicular
• dist. from stem intersects waterline to the axis of rudder stock
• 

• length over all
• dist from extreme ends of stem and stern
• 

created by a force or weight moved through a dist.

the highest point to which center of gravity may rise and still permit the vessel to have positive stability

keel will curve upwards

• .                   FD  +  AD
• FAm  =                2

found by deducting from gross tonnage certain non earning spaces

total of under deck tonnage

• motion about the vessels vertical axis
• 

• side to side linear motion of the ship
• 

• .                  density of subs. in oz per cu. foot
• SG of a subs.    1000 fresh h20

• vertical dist. from above deck datum to surface of the liquid in tank
• 

• space between packages which remain unfilled
• 

her draft when no cargo

total weight of ship when fully loaded

weight applied to material just enough to destroy it

weight applied to material for regular use without destroying it

the estimated resultant of wind, current of tidal stream that will cause a change of position

• 1. expanding square search pattern
• 2. sector search pattern
• 3. parallel track search pattern 2 ships
• 4.     "        "        "         "        3 ships
• 5.     "        "        "         "        4 ships
• 6. ship/aircraft coordinated search pattern

international code of signals

the set of code of  signals consists of

• 26 alphabet flags
• 10 numerical pendants
• 3  substitute
• 1  answering pendant

40 flags all in all

exists  when G is above M

vessel does not tend to return to an erect position after being inclined, but for small angles, tends to cont. inclination or capsize

G conside with M and no righting arm

actual weight of ship and all aboard her at any particular time

weight of ship on light draft

mass per unit volume

maximum breath of the ship measure amidship to the outside of frame

• nylon
• terylene
• manila
• sisal
• coir

number of tons necessary to change the mean draft of a vessel by one inch

curves based on the form of immersed portion of a vessel TPI, MTI, B and M

Traverse position of center of gravity

vertical center of gravity

an outline plan of a ships holds showing cargo disposition

the number of cubic feet of a certain merchandice necessary to weight a longton

ablity of a vessel to return to its original condition after it has been disturbed by an outside force

• 1. clock position
• 2. moderate/ tight/ very tight
• 3. up and down
• 4. across the bow
• 5. under the keel

the probable position of search target which the expected effect of drift since  the initial position

traverse angle of inclination of a vessel

the  moment of tending to heel the vessel

100 cu. ft.

2.83 cu. m

difference of draft aft and forward

keel will curve downwards