This document discusses ship stability, which is one of the most important aspects to consider for safe navigation. It defines stability as a ship's ability to return to its initial position after being heeled by external forces like wind or waves. The document outlines the concepts of static stability and dynamic stability. It explains that a ship's stability depends on the positions of its center of gravity (G) and metacenter (M), noting there can be stable, neutral, or unstable equilibrium depending on their relative heights. Key terms like metacentric height, GM, KG, and KM are defined in relation to calculating a ship's stability. Safe cargo loading and distribution of weights is emphasized as important for maintaining proper stability.

1. República Bolivariana de Venezuela
Ministerio del Poder Popular para la Eduación Superior
Ciencia y Tecnología
Universidad Nacional Experimental Marítima del Caribe
Teacher:
César Rivas
SHIP STABILITY
Cadets:
Camacho Lennin V-24.446.098
Capote Nerileima V-24.805.272
Lisney Escalona V-19.377.640

2. Stability is one of the most important aspects to consider
before going to sea and during navigation on a ship, since
with this study, you can get a better understanding of the
movements and reactions of the ship in different navigation
situations as in loading and unloading maneuvers in port,
and so be able to avoid possible accidents, directly related
to the part of the time with weather conditions and
situations of a bad stowage

3. Its ship ability to return to an initial
position after being heeled by an
external force for a wind or sea water
conditions.

4. Considering the concept of stability we can distinguish:
a) Static stability:
the set of forces acting on the ship in a determined list.
b) Dynamic stability
the work that must be done to bring it from the angle of inclination
to the equilibrium position.

5. The position of the center of gravity (G)
corresponds to the point of application of
the ship's weight, depending on the
thread displacement and the distribution
of weights that is carried out to leave the
boat in a condition of cargo

6. •Metacentric height GM: Distance between the center of gravity (G)
and the metacenter (M).
•KG: is the height of the center of gravity on the keel
•KM: height of the metacenter on the keel, this data is given in the
hydrostatic curve for stability calculations

7. The stability condition of a ship
depends on the stability torque and this
depends on the positions of the center
of gravity and center of the hull.
The equilibrium conditions are:

8. 1.STABLE EQUILIBRIUM OR POSITIVE
STABILITY:
When it is a ship, a cause of a force on
the outside, M is located above G, the
arm of the power generator is on the
ship.
GM +
KM > KG

9. 2.-NEUTRAL EQUILIBRIUM OR
NULL STABILITY
In the case that G and M coincide, no
torque is generated, so the ship will
remain in the position marked.
KM=KG

10. 3.- UNSTABLE EQUILIBRIUM OR
NEGATIVE STABILITY.
When the center of gravity is higher than
the metacenter, the stability pair will spin
the boat in the direction of the arrow and
therefore increase its heel
GM -
KM < KG.

11. Of course, every officer must know
the theoretical calculations of
stability in order to establish the
degree of safety of the ship.
Operations with weights carried out on the
ship that modify the Position of the ship's
center of gravity are loading, unloading and
moving of weights, so you must take into
account the load condition, know your
tonnage to be able to perform the stability
calculations

12. Thank you