Page 373 - Practical Ship Design

Chapter 11

Training required for personnel to enable them to deal with the special
characteristics of, and special requirements on board Ro-Ro ships.
Communications, both within the ship and between the ship and the outside
world.
The adequacy of lifesaving appliances.
The adequacy of search and rescue arrangements.
Overall safety assessment and risk analysis.
Ship/operator relations including the international safety management code.
Survey and inspection.

of the most significant changes from previous rules is the requirement that
calculations of survivability after damage be based on the ship being in seas with a
wave height appropriate to the sea area in which the ship operates, this figure
generally lying between 2 and 4 m.
When Stena Line decided to introduce high speed passenger and car ferries to
their Holyhead-Dun Laoghaire service, they wisely decided that the novelty of this
type of design demanded the adoption of the safety case approach.
A 1997 R.I.N.A. paper by Kuo, Pryka, Sodahl and Craufurd entitled “A Safety
Case for Stena Line’s High Speed Ferry HSS 1500” gives a useful introduction to
safety case methodology.
The questions posed in a safety case examination together with the tasks to be
done to provide answers were set out in Table 1 1.2.

Table 1 1.2

Question Tasks to be done to provide answers
I. Hazard Identification
What aspects of the system can go wrong? Identify potential hazards systematically.

2. Risk Assessment
What are the chances and effects of these going wrong? Assess the risk levels of the identified hazards.

3. Risk Reduction
How can these chances and effects be reduced? Reduce risk levels of selected hazards.

4. Emergency Preparedness
What to do if an accident occurs? Be prepared to respond to emergencies.

5. Safety Management System
How can safety be managed? Manage and control the hazards risk levels.