Type a , b and b60 ships ?

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Ships Type “A”
Ships that comply to the following requirements:
• Were designed to carry only liquid cargoes in bulk
• The cargo tanks have only small access openings which must be
closed by watertight doors, of steel or equivalent material,
provided with gaskets.
• They have low permeability in the loaded cargo compartments
• When loaded to the Summer load line, must float in satisfactory
conditions after the flooding due to the standard damage
• If the ship has L > 150 m the flooded compartment(s) must have an
assumed permeability of 0.95.
• If the ship has L > 225 m the engine room should be also
considered as a floodable compartment, with an assumed
permeability of 0.85.6
M.Ventura Load Lines Convention 11
Ships Type “B”
All the ships which are not of type “A”.
 
Ships Type “B60” and “B100”
• Ships of type “B”, with L > 100 m, may be assigned lower
freeboards values if they satisfy the following conditions:
– A ship that when loaded to the Summer load line will float in a
satisfactory condition, after flooding any compartment other
than the engine room.
– If L > 200 m, the engine room must also be considered a
floodable compartment.
– A ship that satisfy these conditions may have its tabular
freeboard reduced by 60% of the difference between the
values indicated for the type ”A” and for the type “B”.
• The reduction can be increased up to 100% satisfying the
additional requirements:
– To support the simultaneous flooding of 2 adjacent
compartments, by damage of the transverse bulkhead (not
considering the engine room floodable)