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
| 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.