Summary
Choosing suitable
survivability measures is a demanding task that has to start early in the ship
design process. Throughout the design process there is a need for compromises
that will define and sometimes limit future operations or capabilities. In this
study generic survivability measures are compared. The study also examines the sensitivity
of the calculated probabilities to changes in the threat description. The
result shows that it is important to investigate the total effect of a hit over
a set of relevant ship functions defined for example by survivability levels.
The calculations for different threat definitions show that the changes in
survivability are substantial when the threat definition is changed. Moreover,
the effects of different hit assumptions differ between weapon types. This must
be treated as an uncertainty which also should be reflected in the output and
weighted into the decisions made, based on the survivability analysis.
Authors: Hans Liwång,
Swedish Defence University and Chalmers University of Technology, Henrik Jonsson,
Royal Swedish Navy.
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