Transverse bulkheads, while expensive, increase the likelihood of ship survival in the event of hull damage, by limiting flooding to the breached compartments they separate from undamaged ones. Longitudinal bulkheads have a similar purpose, but damaged stability effects must be taken into account to eliminate excessive heeling.
Transverse partitions are a pricey option, but they significantly boost a ship's chances of survival in the event of hull damage by confining flooding to isolated compartments. Similarly, longitudinal partitions serve a similar purpose, but their impact on stability must be carefully evaluated to prevent excessive tilting.