)

unpaved: 637,003 km (1997)

Waterways: 41,009 km

note: navigable inland channels, exclusive of the Great Lakes

Pipelines: petroleum products 276,000 km; natural gas 331,000 km
(1991)

Ports and harbors: Anchorage, Baltimore, Boston, Charleston,
Chicago, Duluth, Hampton Roads, Honolulu, Houston, Jacksonville, Los
Angeles, New Orleans, New York, Philadelphia, Port Canaveral,
Portland (Oregon), Prudhoe Bay, San Francisco, Savannah, Seattle,
Tampa, Toledo

Merchant marine: total: 376 ships (1,000 GRT or over) totaling
10,814,622 GRT/14,416,517 DWT

ships by type: barge carrier 9, bulk 68, cargo 29, chemical tanker
13, combination bulk 3, container 80, liquefied gas 1,
multi-functional large-load carrier 3, passenger 9, passenger/cargo
1, petroleum tanker 98, roll on/roll off 49, short-sea passenger 3,
specialized tanker 1, vehicle carrier 9 (2000 est.)

Airports: 14,720 (2000 est.)

Airports - with paved runways: total: 5,174

over 3,047 m: 182

2,438 to 3,047 m: 220

1,524 to 2,437 m: 1,331

914 to 1,523 m: 2,440

under 914 m: 1,001 (2000 est.)

Airports - with unpaved runways: total: 9,546

over 3,047 m: 3

2,438 to 3,047 m: 6

1,524 to 2,437 m: 164

914 to 1,523 m: 1,675

under 914 m: 7,698 (2000 est.)

Heliports: 131 (2000 est.)

United States Military

Military branches: Department of the Army, Department of the Navy
(includes Marine Corps), Department of the Air Force

note: the Coast Guard is normally subordinate to the Department of
Transportation, but in wartime reports to the Department of the Navy

Military manpower - military age: 18 years of age

Military manpower - availability: males age 15-49: 70,819,436 (2001
est.)

Military manpower - fit for military service: NA

Military manpower - reaching military age annually: males:
2,039,414 (2001 est.)

Military expenditures - dollar figure: $276.7 billion (FY99 est.)

Military expenditures - percent of GDP: 3.2% (FY99 est.)

United States Transnational Issues

Disputes - international: maritime boundary disputes with Canada
(Dixon Entrance, Beaufort Sea, Strait of Juan de Fuca, Machias Seal
Island); US Naval Base at Guantanamo Bay is leased from Cuba and
only mutual agreement or US abandonment of the area can terminate
the lease; Haiti claims Navassa Island; US has made no territorial
claim in Antarctica (but has reserved the right to do so) and does
not recognize the claims of any