Harbour Dues 1 : Various local charges against all seagoing vessels entering a harbour, to cover maintenance of channel depths, buoys, and lights etc. All harbours do not necessarily have this charge.
Ports and Ships: Port news and Shipping Movements in African and, Glossary of maritime terms, Durban, South Africa 2012. http://ports.co.za/maritime-terms.php, (Mrtm/ Ports and Ships - Brit) {538}