1. All fishermen were advised to remain at port due to rough seas. 2. Tonnage is also the basis for calculating registration fees and port dues . 3. Many ships were also bypassing the country's main port due to higher insurance premiums. 4. An increasing number run into money problems while in port due to Russia's severe economic crisis. 5. There is also a move to create this port as a free port due to its commercial inactivity. 6. During colonial times Riohacha was a very important port due to the discovery of vast numbers of pearls. 7. Hong Kong registered ships can enjoy about 30 % preferential port dues in mainland China port since January 2000. 8. The British government banned attacks on land targets and German warships in port due to the risk of civilian casualties. 9. Marder 1A3 and above do not have gun ports due to an extra layer of armour and outside storage boxes. 10. By the 15th century, Singapore had declined as an international trading port due to the ascendance of the Malacca Sultanate.