OVERVIEW

The teaching unit deals with the ship buoyancy and stability, with a specific focus on the operational aspects of the ship. Topics are going to be treated both from a theroetical and a practical point of view. The matter plays a siginficant role in the context of ship safety and marine pollution prevention. The lecture cycle covers the requirements for knowledge, understanding and proficiency of the competences addressed by the STCW Code.

AIMS AND CONTENT

LEARNING OUTCOMES

The teaching unit provides knowledge about the buoyancy and the stability of ships, both in intact and damaged conditions, with appropriate reference to relevant IMO regulations. Specific attention will be given also to some operational aspects e.g. to cargo handling and stowage.

AIMS AND LEARNING OUTCOMES

The teaching unit enables the capability of:

- Evaluate the ship equilibrium in a specific laoding condition and the evaluation of the relevant stability as well;

- Prevent dangerous situations in relation with shift and lift of weights, liquid free surface and inclining effects

- Understand the basic physics of a ship in damaged condition

- Understand the stability requirements for a ship in intact or damage condition

The lecture cycle covers the requirements for knowledge, understanding and proficiency in table A-ll/1,2 (deck officer) of STCW Code for the function Navigation at the Management Level, for the function Cargo Handling and Stowage at the Management Level and the background knowledge to support Controlling the Operation of the Ship and Care for Persons on Board at the Management Level, and the requirements in table A-llI/1,2 (Marine Engineer) for the function Controlling the operation of the ship and care for persons on board at the management level.

The teaching unit contributes to the development of soft-skills, i.e. the alphabetical-functional competence.

PREREQUISITES

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TEACHING METHODS

Lectures in classroom;

practical applications together and individually;

interactions and discussion on some selected topics.

Working students and students with certified SLD (Specific Learning Disorders), disability or other special educational needs are advised to contact the teacher at the beginning of the course to agree on teaching and examination arrangements so to take into account individual learning patterns, while respecting the teaching objectives.

SYLLABUS/CONTENT

• Introduction to the concept of safety;  FLAG STATE, PORT STATE, IMO (Conventions and Codes), IACS
• First order moments (of area, mass,…)
• Moment of inertia - second order moments (or area, mass,…)
• Introduction to lines plan – offset
• Hydrostatics
• Bonjean Tables
• Cross Curves
• Archimedes Principle
• The calculation of the ship weight
• Loading and unloading of weights
• Shift of weights on board
• The ship equilibrium
• The metacentric methodology for the ship equilibrium calculation
• Euler’s theorem
• The nature of equilibrium: ship stability
• Metacentric height
• Comments on the roll period
• Righting moment and righting arm
• Heeling moment due to the shift of weight in the transverse plan (Y,Z)
• Wind heeling moment 
• Heeling moment due to turning at high speed
• Free surface correction
• Lightship weight evaluation
• Inclining test
• Intact Stability code
• IS Code – specific focus on weather criterion
• The constant displacement method for the evaluation of the equilibrium condition of a ship in damages condition
• Considerations about deterministic SOLAS requirements
• Considerations about probabilistic SOLAS 2009
• Grounding

RECOMMENDED READING/BIBLIOGRAPHY

The IMO safety rules relevant to the intact and damaged ship stability that are available on aulaweb.

"Ship Hydrostatics and Stability" A.B. Biran - Technion - Faculty of Mechanical Engineering. Butterworth-Heinemann 2003. (Be careful about notations that might be different)

TEACHERS AND EXAM BOARD

Exam Board

PAOLA GUALENI (President)

NICOLA PETACCO

BENEDETTO PIAGGIO (President Substitute)

FEDERICO SILVESTRO (President Substitute)

LESSONS

LESSONS START

https://corsi.unige.it/10948/p/studenti-orario

Class schedule

The timetable for this course is available here: Portale EasyAcademy

EXAMS

EXAM DESCRIPTION

Oral exam: discussion of an assignment* previously developed and theoretical questions about the topics developed during the semester.

The assignment and the theoretical questions equally contribute to the final mark.

*The assignment is about basic application of ship hydrostatics and stability (practical calculations)

ASSESSMENT METHODS

With the written assignement, students will be requested to give evidence about capability to apply in practice the theorethical methodologies with the proper critical attitude toward results.

Questions of the oral test are aimed to assess the capability of the students to discuss about theorethical and practical aspects of ship hydrostatics and stability.

Specific attention will be given to the capability of indicating the basic assuptions together with the input data, the target of the procedure and its rational developement.

The assignment and the theoretical questions equally contribute to the final mark.

Exam schedule