Bosnia and Herzegovina
NA km; large sections of the Sava blocked by
downed bridges, silt, and debris
Botswana
none
Bouvet Island
none
Brazil
50,000 km
British Indian Ocean Territory
none
British Virgin Islands
none
Brunei
209 km; navigable by craft drawing less than 1.2 m
Bulgaria
470 km (1987)
Burkina Faso
none
Burma
12,800 km
note: 3,200 km navigable by large commercial vessels