Spratly Islands:
none
Sri Lanka:
430 km (navigable by shallow-draft craft)
Sudan:
5,310 km
Suriname:
1,200 km
note: most important means of transport; oceangoing vessels with
drafts ranging up to 7 m can navigate many of the principal waterways
Svalbard:
none
Swaziland:
none
Sweden:
2,052 km
note: navigable for small steamers and barges
Switzerland:
65 km