The longitudinal extent of one compartment may vary depending
on whether transversal wing tank bulkheads exceed B/5 (or 11.5 m,
whichever is less) or not, see the damages of sketch below.
1 Normal B/5 or 11.5 m damage;
2. and 3 Transverse bulkhead exceeding B/5 or
11.5 m undamaged (two single one compartment damage cases); and
4 Transverse bulkhead not exceeding B/5 or 11.5
m damaged (one single one compartment damage case).