Attributes for Sailing Ships Expert System
Attribute (Decision Tree)	Attribute (Expert System)	Values	Image	Help Notes
Masts	The number of masts on the vessel is	3 or more 2 only 1 only		The masts are the large upright poles that hold the sails.
Square sails	There are square sails on	all masts first 2 masts only first mast only no masts		Square sails are fixed to the rigging at 4 points. Triangular sail at only 3 points.
Square sails	There are square sails on	first 2 masts only no masts first mast only		Square sails are fixed to the rigging at 4 points. Triangular sail at only 3 points.
Taller	The taller of the 2 masts is the	the aft mast the fore mast		The fore mast is the one nearer the front. The aft mast is the one nearer the back.
Aft mast	Tthe aft mast is	fore of the rudder aft of the rudder		The rudder is at the back of the hull and is used for steering the vessel.
Foresails	Tthe number of foresails the vessel has is	1 only 2 or more		Foresails are rigged in front of the fore mast and attached to the bow.

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