TABLE E-2 Changes in Age of the U.S. Trading Fleet Based on Port Calls by Ownership Category, 1990-1994

 

Government

Independents

Oil Companies

Age Range

1990

1994

Change

1990

1994

Change

1990

1994

Change

0-4

2.13

2.39

+0.28

2.22

2.04

-0.18

2.46

1.65

-0.81

5-9

7.98

7.51

-0.47

7.64

6.79

-0.85

8.01

6.53

-1.48

10-14

12.29

11.79

-0.50

12.43

12.53

+0.10

12.16

12.34

+0.18

15-19

15.00

17.26

+2.26

15.90

17.49

+1.59

16.06

17.58

+1.52

20-24

 

 

 

20.87

20.97

+0.10

20.87

20.41

-0.46

25 or more

 

 

 

36.24

34.16

-2.08

30.45

37.14

+6.69

Total

9.10

8.85

-0.35

11.64

10.15

-1.49

12.92

10.41

-2.51

In looking beyond averages at size categories, it can be seen that the average age of government vessels has been decreasing for smaller vessels (<150,000 DWT [deadweight tons]) and becoming more diverse for larger vessels (> 150,000 DWT). The same broadly applies to oil companies. Independents show a split tendency, with old and young ships predominating in large sizes but few in the middle age bands, and a broad balance in the smaller sizes (see Table E-3).



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement