AF - Advanced Features

The Advanced Features (AF) module adds certain tools to GHS which are very useful for certain kinds of vessels but are not needed by all GHS users.

In its present version the AF module contains two tools; one for intact stability, the other for damage stability.

Intact Stability

Addressing a special problem which occurs with submarines, floating drydocks, and other submersible structures, a table and plot of transverse GM as a function of tank loading is produced. This makes it easy to spot low GM phases in a submerging or desubmerging operation.

Damage Stability

Implementations of the several versions of IMO probabilistic damage evaluation for cargo and passenger vessels are provided in the AF module. These are complex rules which assign probabilities to various extents of damage and probabilities of survival related to the stability characteristics in flooded conditions. A summation of these probabilities over all survivable extents of damage yields a "Subdivision Index" which is compared to a minimum requirement for the particular vessel.

Functionally, the AF module is smoothly integrated with the GHS main program so that its features are accessed through additional commnads.

More about the latest probabilistic methods and the DAMSTAB2 wizard.