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I first want to congratulate the authors with their result in an attempt to address survivability assessment in the concept design phase of a naval ship. Especially the developed method for assessing “recoverability” as an integrated part of “survivability” is very original as well as a very practical and transparent approach. This method fits very well with the level of design information that can be made available during concept phase and the need for design decisions on this matter. Existing, more accurate methods for assessing these aspects often require much more design information, often only available much later in the design process when the freedom to further improve the design, based on these results of the assessment, has been reduced dramatically.