BTS | TABLE 4 - Conditions per Node for Expanding the Classification Tree

TABLE 4 - Conditions per Node for Expanding the Classification Tree

Node	Condition
1	Year ship was built ≤ 1973
2	Year ship was built in (1973-1977]
3	Year ship was built in (1977-1981]
4	Year ship was built > 1981
5	Geographic area = {Mediterranean-Black Sea; China Sea-Japan; Persian Gulf-Bay of Bengal; North Sea, Baltic; N. & S. America, Pacific Coast; Alaska-Bering-USSR Arctic-Iceland; Atlantic Ocean; Gulf of Mexico-W. Indies-Newfoundland}
6	Geographic area ={Pacific Ocean; Atlantic Ocean; Red Sea-W. and E. African Coast}
7	Location = {overseas}
8	Location = {controlled seaways, ports}
9	Gross tonnage ≤ 12603
10	Gross tonnage (12,603-16,705]
11	Gross tonnage > 16,705
12	Geographic area = {Mediterranean-Black Sea; Australia; Alaska-Bering-USSR Arctic-Iceland}
13	Geographic area = {China Sea-Japan; Persian Gulf-Bay of Bengal; North Sea, Baltic; N. & S. America, Pacific Coast; Atlantic Ocean; Gulf of Mexico-W. Indies-Newfoundland; Pacific Ocean; Atlantic Ocean; Red Sea-W. and E. African Coast}