Safe maneuvering technology for ensuring submarine′s survivability

From the angle of submarine′s maneuvering security,the measures of securing the submarine′s survivability were discussed;the conception of submarine′s safe navigation depth was presented and its definition principle and method were put forward.And meanwhile the harm and its redemptive measures were analyzed when the rudders were blocked or seawater came into the cabin.Moreover,the composition,protraction and usage of MLD(maneuvering limitation diagram) were described.