NAVAL ARCHITECTURE AND SHIP STABILITY
Educational objectives: they are mainly related to the assessment of the
ship geometrical properties, starting from its body plan. Subsequently,
the course focuses on all topics related to the equilibrium and stability of
equilibrium of free-floating bodies and ships, also with reference to the
intact stability criteria and the employment of the ship stability booklet.
Knowledge and understanding: Students shall prove to know the main
topics related to the assessment and evaluation of equilibrium conditions
and stability of equilibrium for free-floating bodies.
Ability to apply knowledge and understanding: Students shall prove to
apply the acquired topics and theoretical proficiencies, required to
evaluate the equilibrium conditions, the stability of equilibrium of free floating bodies.
Judgment autonomy: Students shall autonomously evaluate and assess
the ship stability, applying the best resolutions to increase it.
Communicative Skills: Students shall acquire the skill of presenting a
numerical application about the main topics of Naval Architecture, such
as the ship hydrostatic calculations, and correctly applying the scientific
Learning Skills: Students shall be capable of continuously update their
skills, by reading books, articles and rules (mainly in English), in order to
acquire a good capacity of enhancing the own knowledge in the field of
della nave; il bordo libero e la Convenzione Internazionale ILLC.
Even if not mandatory, it is suggested to have passed the exams of
Mathematics and Physics.
SHIP STABILITY (C/M.1 - 48 h)
Basic hydrostatics: definition and physical properties of fluids; units of
measure and fundamental laws of hydrostatics; centre of mass and
moments of inertia; principal and central exes of inertia; approximate
integration techniques: Bezout and Simpson methods.
Basics of ship geometry: main parts of the ship; basic nomenclature;
main dimensions and characteristic parameters; displacement and ship
centre of mass; net weight and deadweight of a ship.
The ship hull forms: the body plan; affinity and similitude ratios; hull
forms development from a systematic series.
Equilibrium and stability of equilibrium of free-floating bodies:
Archimede’s law; stable, unstable and neutral equilibrium; transverse and
longitudinal metacentric heights; static stability diagram.
Some applications concerning the hull body plan: detection and drawing
of an upright or inclined waterplane. Upright hydrostatics: evaluation of
the geometrical parameters of a waterplane area; evaluation of the
volume and centre of volume coordinates; upright hydrostatics;
hydrostatic diagrams. Incidence of weights on the equilibrium and
stability of equilibrium: relocation, loading and unloading operations of
Ship stability: IMO intact stability criteria; weather criterions; inclining
test; stability booklet on ship stability; the ship freeboard and the ILLC
The course furnishes the basic elements concerning the hull geometry,
with particular reference to the equilibrium and the stability of
equilibrium of free-floating bodies. Besides, it furnishes all the
mathematical proficiencies required to carry out and apply the ship
The course furnishes some competencies required by the STCW
Convention, as amended, for Deck Officers and Marine Engineers at
Operational Level, embodied in the MIT decree dated 19th December
2016, namely “Percorso formativo per accedere alle figure professionali
di Allievo Ufficiale di Coperta e Allievo Ufficiale di Macchina”.
Particularly, the course furnishes the following competencies, listed in the
Attachments I and II of the above-mentioned decree, for Deck Officer and
Marine Engineer Cadets:
C/M.1: Ship stability (48 h).
Further details about the acquired competencies are furnished in the
extended version of the programme.
Frontal lessons, discussion of case studies, reading of the main national
and international rules.
The teaching material consists of:
- Reference books in Italian and English;
- Technical Rules in English.
The exam consists of verifying the achievement of the previously defined
educational goals, by an oral examination during which a numerical
application, which is generally relative to the ship hydrostatic
calculations, is fully discussed.