BTS | Table 3 - Age of the U.S.-Flag Vessels: As of December 31, 1999 (<a href="#1">1</a>)

Table 3
Age of the U.S.-Flag Vessels: As of December 31, 1999¹

Vessel type	Age (percentage of total for each vessel type)²
Vessel type	Number	# 5	6–10	11–15	16–20	21–25	> 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.