Senegal
897 km
note: 785 km on the Senegal river, and 112 km on the Saloum river
Serbia and Montenegro
587 km
note: the Danube River, central Europe's connection to the Black
Sea, runs through Serbia; since early 2000, a pontoon bridge,
replacing a destroyed conventional bridge, has obstructed river
traffic at Novi Sad; the obstruction is bypassed by a canal system,
but the inadequate lock size limits the size of vessels which may
pass; the pontoon bridge can be opened for large ships but has
slowed river traffic (2001)
Seychelles
none
Sierra Leone
800 km (of which 600 km is navigable year round)
Singapore
none
Slovakia
172 km (all on the Danube)
Slovenia
NA
Solomon Islands
none
Somalia
none
South Africa
NA