This paper presents an overview of developments related to the
dynamic behavior of intact and damaged ships and offshore
platforms in extreme weather conditions. Capsize mechanisms
are discussed, including flooding through damage openings and
the behavior of flood water. The paper gives a brief analysis of
the major accidents of three semisubmersible platforms, where
the loss of stability played a role in their foundering. The
development of regulations accounting for dynamic stability of
MODUs is reviewed. The paper treats in some detail the aspects
associated with the numerical modeling of intact and damaged
vessels and moored offshore platforms in heavy seas.