Unite Chart Permit For Free

If the information is not correctly transferred to the charts, this could result in a ship grounding, a risk of damage to property, a pollution incident or contravention of local laws. Additionally, if there is a casualty, the seaworthiness of the ship could be called into question.

To correct a chart, look up the number of the chart in the index at the front of the NTM, by the chart number there will be a list of all the corrections that relate to that chart. Each correction is given a number to identify it. You then need to look up the correction to discover the details.

Admiralty Notices to Mariners or Weekly Notices serve the purpose of correcting and updating charts, which are being supplied to the vessels electronically or in paper format.

Notices to Mariners (NtM) are corrections to nautical charts and publications. NtM only contain information which is vitally important to safety at sea. Mariners are obliged to keep their products up-to-date with NtM until a new edition is issued. NtM only apply to editions in force.

Permits are used to control the permission to use a chart. They prevent unofficial copying and distribution.

To correct a chart, look up the number of the chart in the index at the front of the NTM, by the chart number there will be a list of all the corrections that relate to that chart. Each correction is given a number to identify it. You then need to look up the correction to discover the details.

Major changes covering a large area will require a new edition of the chart to be published, but when small important changes can be made by hand on the chart, the corrections are issued as a Notice to Mariners (NM or Notam), or a stick on Notice to Mariners Block.