Since the fulfillment of combat mission and safety return of the naval ship's crew is the ultimate purpose for the security of its survivability, it is very important to secure his safety in its shock hardening. In spite of such an importance, however, the researches on the crew survivability to underwater shock are insufficient compared to those on the ship structures and onboard equipments under UNDEX(UNDerwater EXplosion), and the systematic protection regulations and/or criteria related to the crew have not yet been provided.
At present, there are two kinds of injury criteria for crew against UNDEX loadings,such as tolerance level criteria for each component of human body and injury limit of a ship’s deck motion specified in Germanishcher Lloyd’s rule. The objective of this study is to establish injury estimation and criteria for crew subjected to UNDEX loadings through the examination of a correlation between two criteria by the numerical biodynamic response analyses of standing and sitting postured humans on MIL-S-901D SFSP(Standard Floating Shock Platform) and against BV043/85 shock response spectrum subjected to UNDEX and by the comparison of shock response results with two criteria. From this study, it could be confirmed that there is a strong correlation between two criteria.