Table 3 - Age of the U.S.-Flag Vessels: As of December 31, 1999

Table 3 - Age of the U.S.-Flag Vessels: As of December 31, 1999

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Vessel type Age (percentage of total for each vessel type)2
Number # 5 610 1115 1620 2125 > 25
Vessels (total)3 41,766 19.1 9.4 4.2 24.3 18 24.6
Self-propelled (total) 8,379 9.1 5.4 6 23.5 17.4 38.4
Dry cargo 695 8.6 7.1 14 21 14.2 35
Tanker 142 8.5 2.1 8.5 24.6 21.1 35.2
Towboat 5,098 5.9 2.7 2.9 21.6 18.7 48
Passenger4 970 14.8 15.1 18.9 12.4 9.8 29.1
Offshore supply 1,470 16.7 7.8 4.1 38.8 19.3 13
Barge (total) 33,387 21.6 10.5 3.8 24.4 18.2 21.1
Dry covered 13,477 27.4 6.7 0.8 33.7 19.2 12.2
Dry open 9,146 22.5 17.5 7.6 22.2 15 15.1
Lash/SEABEE5 1,796 0 16 6.2 2 43.9 31.9
Deck 4,842 17.9 8.2 6.3 16 11 38
Other dry cargo6 153 7.2 5.2 7.2 24.2 11.1 37.3
Single hull tank 685 3.5 1.9 1.9 19.3 11.4 61.9
Double hull tank 2,621 16.6 10.4 0.8 19 21.6 31.7
Other tank7 667 16 1.8 0.9 16.9 17.2 45.9

1 Survey date as of December 31, 1998; includes updates through December 2000.

2 Age (in years) is based on the year the vessel was built or rebuilt, using calendar year 1999 as the base year.

3 Total is greater than the sum because of 4 unclassified vessels and 168 of unknown age; figures include vessels available for operation.

4 Includes passenger and excursion/sightseeing.

5 Lighter aboard ship (barge rides on a mother ship).

6 Includes dry cargo barges that may be open or covered, railcar, pontoon, roll-on/roll-off, container, or convertible.

7 Includes tank barges that may be double-sided only, double-bottom only, or not elsewhere classified.

SOURCES: U.S. Army Corps of Engineers, Navigation Data Center, U.S. Waterway System Facts, available at http://www.wrsc.usace.army.mil/ndc/wcsc.htm.