note: The Rhine carries heavy traffic on the Basel-Rheinfelden and
Schaffhausen-Bodensee stretches; there are also 12 navigable lakes
Syria:
870 km (minimal economic importance)
Tajikistan:
none
Tanzania:
note: Lake Tanganyika, Lake Victoria, and Lake Nyasa are
principal avenues of commerce between Tanzania and its neighbors on
those lakes
Thailand:
4,000 km
note: 3,701 km are navigable throughout the year by boats with drafts up to 0.9 meters; numerous minor waterways serve shallow-draft native craft
Togo:
50 km (Mono river)
Tokelau:
none
Tonga:
none
Trinidad and Tobago:
none