Double Skin
Provides environmental protection and watertight integrity
Torsion box
Reduces twisting, adds rigidity
Double bottom
Second skin, mitigates grounding, extra protection
Lightening hole
Provides access to tanks, reduces weight of vessel
Longitudinal stiffener
Adds rigidity and strength to vessel
Tank top playing
Adds rigidity
Continuous deck
Provides watertight integrity, prevents liquids from spilling
Longitudinal bulkhead
Adds strength, prevents sloshing of liquids therefore preventing free surface effect
Bilge radius
Increases stability of vessel
Floor
Adds strength and rigidity