Assertion: rudder's area | /r/HasProperty | about 2 percent of the product
Facets:
value: for merchant ships
type: TRANSITIVE-OBJECT
value: usually
type: TEMPORAL
Source sentences:
text: For merchant ships, the area of the rudder is usually about 2 percent of the product LTfor ships 120m long and over; L is length between perpendiculars and T is draft.'