Second Modifier	Category	Code	Remarks
Nuclear Powered	Ship Propulsion	01
{Disused}		02
{Disused}		03
{Disused}		04
Dock	Cargo Capacity	05
Logistics	Cargo Capacity	06
Tank	Cargo Capacity	07
Vehicle	Cargo Capacity	08
Fast	Ship Mobility	09
Air–Cushioned (US)	Ship Mobility	10
Air–Cushioned (NATO)	Ship Mobility	11
Hydrofoil	Ship Mobility	12
{Disused}		13
{Disused}		14
{Disused}		15
{Disused}		16