Page 93 - Introduction to Naval Architecture

80 FLOTATION AND STABILITY

Figure 435 Asymmetrical flooding

As with the calculation for trim, this first angle will need to be
corrected for the additional weight of water at the new waterline, and
the process repeated if necessary.
Large heels should be avoided and usually means are provided to
flood a compartment on the opposite side of the ship. This is termed
counter/Hooding. The ship will sink deeper in the water but this is
usually a less dangerous situation than that posed by the heel.

Floodable length
So far the consequences of flooding a particular compartment have
been studied. The problem can be looked at the other way by asking
what length of ship can be flooded without loss of the ship. Loss is
generally accepted to occur when the damaged waterline is tangent
to the bulkhead deck line at side. The bulkhead deck is the uppermost
weathertight deck to which transverse watertight bulkheads are
carried. A margin is desirable and the limit is taken when the

Figure 4.36