1.1.1 The Submarine Assurance Framework structure consists of a hierarchy in
which lower-level tiers support upper tiers.
1.1.2 For each subject or major hazard covered by a part of the Submarine
Assurance Framework, such as Fire Safety, a succinct goal is established. For
example, the goal for fire safety may include the statement ‘The submarine,
arrangements, shall be designed, constructed and maintained in such a way that the
fire can be prevented, detected, contained and extinguished so that essential safety
functions can be maintained’.