1.1.1 This
Chapter contains design requirements that have to be complied with
as part of 
100A1 classification, ship type or a special
notation such as IB.
1.1.2 Where
significant regions of the hull structure are rendered ineffective
by the threat under consideration, a residual strength calculation
is to be carried out to verify the capability of the remaining structure.
1.1.3 For
structure designed in accordance with the appropriate Sections of
this chapter the following notations will be assigned. The level of
threat and notation will remain confidential to the Owner and Clasifications
Register (hereinafter referred to as 'LR') unless requested otherwise.
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EB for external blast assessment.
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IB for internal blast assessment.
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FP for fragmentation protection.
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SP for small arms protection.
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SH for assessment against underwater explosion (shock).
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WH for whipping assessment.
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RSA for a residual strength assessment, see
Vol 1, Pt 6, Ch 4, 4 Residual Strength Assessment, RSA.