Determination of position on the sea was one of the most demanding operations by the knowledge and the technique thereby is applied, and all of that wouldn't be possible without navigational chart. During the time since the chart was issued changes occurred on the sea bottom, these changes must be entered on the nautical chart for the purpose of safety of navigation, and that process is called „updating nautical charts“. Corrections are issued by state Hydrographic Institute and published in the Notice to Mariners. In today's modern world they have developed (Electronic Navigation Chart - ENC), that greatly facilitate the work of officers, so their using is rapidly growing in navigation practice, and the reasons are understandable archiving and updating is much easier. According to the (Safety Of Life At Sea – SOLAS) Convention, all ships are required to have adequate and up-to-date navigational charts, it is necessary to cooperate between developed and undeveloped coastal states in collecting as much relevant nautical information as possible and that this information is available on a worldwide scale through nautical publications.