Once a chart is published, constantly changing navigational features and aids or other relevant information have to be promulgated in order to update the ships navigating in those areas. Find out different methods of updating navigation charts on ships.
The annual survey of notices to mariners is a yearly publication which advice mariners on important matters related to ship’s navigation, hydro graphic information, aids to navigation, and changes in shipping channels.
Whenever a new area is to be added to a chart or it has to represent an area different from the previous chart, or the depth units shown on previous charts have to be changed, nautical charts need to be corrected. Find out how nautical charts are corrected on board ships.
Nautical Charts used at sea have evolved over time. Fathom charts, one of the most important navigation charts used in the earlier times were gradually replaced by more enhanced charts.
Nautical charts are one of the most important tools for ship navigation. Learn about different types of marine charts based on their origin.