Module Details

Module Code: NAUT8017
Title: Ship Stability (Management)
Long Title: Management and Control of Ship Stability for Senior Deck Officers
NFQ Level: Advanced
Valid From: Semester 1 - 2013/14 ( September 2013 )
Duration: 1 Semester
Credits: 5
Field of Study: 5253 - Nautical Science
Module Delivered in: 2 programme(s)
Module Description: This module covers the control and management of ship stability while at sea and in port for both intact and damaged conditions. It complies with the IMO STCW 95 Code and the regulations of the Department of Transport for senior deck officers.
 
Learning Outcomes
On successful completion of this module the learner will be able to:
# Learning Outcome Description
LO1 Appraise the need for adequate stability when a vessel drydocks.
LO2 Assess the effect on ship manoeuvrability of shallow water, interaction, and heel.
LO3 Appraise the sources of ship stability information.
LO4 Assess a vessel's stability during typical cargo operations, both at sea and in port.
LO5 Determine the effect on a ship's draft and stability of damage to the hull.
LO6 Determine the effect on a ship of uneven distribution of cargo, both at sea and in port.
Dependencies
Module Recommendations

This is prior learning (or a practical skill) that is strongly recommended before enrolment in this module. You may enrol in this module if you have not acquired the recommended learning but you will have considerable difficulty in passing (i.e. achieving the learning outcomes of) the module. While the prior learning is expressed as named MTU module(s) it also allows for learning (in another module or modules) which is equivalent to the learning specified in the named module(s).
'Ship Construction and Stability' Level 7
Incompatible Modules
These are modules which have learning outcomes that are too similar to the learning outcomes of this module. You may not earn additional credit for the same learning and therefore you may not enrol in this module if you have successfully completed any modules in the incompatible list.
No incompatible modules listed
Co-requisite Modules
No Co-requisite modules listed
Requirements

This is prior learning (or a practical skill) that is mandatory before enrolment in this module is allowed. You may not enrol on this module if you have not acquired the learning specified in this section.
No requirements listed
 
Indicative Content
Drydocking
Calculate reduction in metacentric height by MM' and GG' methods. Describe effect on stability of taking blocks. Calculate drafts at end of critical period. Predict max. trim to achieve given GM at critical instant. Compare effect of drydocking and grounding at a single point.
Stability calculations - intact condition
IMO intact stability standard. Use of Simiplified Data. Draw and evaluate curves of Righting Levers to prove compliance with IMO standard. Inclining Experiment: theory and practice. Use of stability information on board ship. Effect of density on hydrostatic information.
Stability characteristics
The unique stability characteristics of tugs, Ro-Ro vessels, supply vessels, timber carriers, VLCCs and HSCs.
Stability Problems
Stability problems arising with timber deck cargoes, coal, grain, and bulk concentrates. Effect of a cargo shift on Statical and Dynamical stability. Stability in ice conditions. Effect of free surface on vessel stability.
Vessel rolling
Passive and active stabilisers. Synchronous rolling and pitching. Parametric rolling. Changes in stability during a voyage. Use of ballast, bunkers, or cargo for adequate stability. Effect of freeboard and trim on statical stability.
Stability at large angles
Use of Wall Sided formula and derivatives. Angle of Loll: theory and calculation.
Damage stability
IMO requirements. Calculate pressure and thrust on bulkheads. Calculate effect on draft, trim, and list when a compartment anywhere in the ship's length is bilged. Theorem of parallel axis.
Longitudinal stress
Draw buoyancy, shear, load, and bending moment curves for vessel for still and seagoing conditions. Determine vessel compliance with maximum permitted shear force and bending moment values.
Manoeuvrability
Effect of frictional resistance on ship movement. Effect of shallow water. Explain ship to ship and ship to shore interaction. Evaluate angle of heel and increase in draft when turning at speed.
Stability Condition sheet
Use Microsoft Excel spreadsheet to create a Worksheet to calculate stability for typical loaded condidtions and compare results against the IMO Intact Stability Standard
Module Content & Assessment
Assessment Breakdown%
Coursework20.00%
End of Module Formal Examination80.00%

Assessments

Coursework
Assessment Type Other % of Total Mark 20
Timing Week 10 Learning Outcomes 3,4,6
Assessment Description
Student to create an Excel Workbook to assess the effects on ship stability of typical cargo operations
End of Module Formal Examination
Assessment Type Formal Exam % of Total Mark 80
Timing End-of-Semester Learning Outcomes 1,2,3,4,5,6
Assessment Description
End-of-Semester Final Examination
Reassessment Requirement
Repeat examination
Reassessment of this module will consist of a repeat examination. It is possible that there will also be a requirement to be reassessed in a coursework element.

The University reserves the right to alter the nature and timings of assessment

 

Module Workload

Workload: Full Time
Workload Type Contact Type Workload Description Frequency Average Weekly Learner Workload Hours
Lecture Contact Theory Every Week 5.00 5
Independent & Directed Learning (Non-contact) Non Contact Self study Every Week 2.00 2
Total Hours 7.00
Total Weekly Learner Workload 7.00
Total Weekly Contact Hours 5.00
This module has no Part Time workload.
 
Module Resources
Recommended Book Resources
  • D.R. Derrett. (1999), Ship Stability for Masters and Mates, fifth. Butterworth-Heinemann, London, [ISBN: 0 7506 4101 0].
  • Martin A Rhodes. (2003), Ship Stability for Mates/Masters, Seamanship International Ltd, Glasgow, [ISBN: 0-9534379-3-0].
  • International Maritime Organisation. (2009), International Code on Intact Stability, 2008, Third edition. IMO, London, [ISBN: 978-92-801-1506-2].
Supplementary Book Resources
  • Irish Government Publication. (1985), SI 274 of 1985 MS (Passenger Ship Construction and Survey) Rules, 1985 and amendments, Dublin.
  • Irish Government Publication. (1998), SI 429 of 1998 MS (Ro-Ro Passenger Ship Survivability) Rules, 1998 and amendments, Dublin.
  • Irish Government Publication. (2001), SI 424 of 2001 MS (Load Lines) Rules, 2001, Dublin.
  • Irish Government Publication. (1983), SI 307 of 1983 MS (Grain) Rules, Dublin.
  • Eric Tupper. Introduction to Naval Architecture.
  • Volker Bertram. Practical Ship Hydrodynamics.
  • David J House. Drydocking and Shipboard Maintenance - A Guide for Industry.
  • International Institute of Marine Surveyors. Code of Practice for Draught Surveys.
This module does not have any article/paper resources
This module does not have any other resources
 
Module Delivered in
Programme Code Programme Semester Delivery
CR_SNASC_8 Bachelor of Science (Honours) in Nautical Science 1 Mandatory
CR_SNSCI_8 Certificate in Nautical Science 1 Mandatory