Ships Companies Ports Documents Distances FAQ Contacts Sao Tome et Principe Time: GMT. International dialling code: +239. Territorial waters: Limit of 12nm claimed of territorial waters and a limit of 20nm for an exclusive economic zone. Capital city: Sao Tome. PORT LATITUDE LONGITUDE REMARK UNCTAD TIME ZONE MAX DRAFT MAIN PORT DETAILS Santo Antonio 01° 39.0' N 007° 27.0' E Port Open STSAA GMT 17.90   Details Sao Tome 00° 21.0' N 006° 45.0' E Port Open STTMS GMT 10.00   Details