Neither São Tomé nor Principe has a deep
harbour. The loading and unloading of supply ships is therefore difficult. The
islands each have an airport; only the airport at São Tomé is suitable for
landing larger aircraft.
The made-up road network outside
the built-up areas totals 117 km (of which 110 km is on São Tomé and
Principe).
There is sufficient good quality
drinking water available.