TABLE 4 - Conditions per Node for Expanding the Classification Tree

TABLE 4 - Conditions per Node for Expanding the Classification Tree

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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}