Boaters have been warned of navigable changes on Breydon Water.
The Broads Authority has issued a map showing changes it has made to the Channel Markers on Breydon Water at Great Yarmouth.
Some markers have been removed, including the cardinal mark at the end of Turntide Jetty, while others have been added to help novice boaters navigate through the area.
A yellow post is in place to mark the corner of this structure.
The Broads Authority says that "vessels should ensure that the changes are taken into consideration for passage planning and when navigating in this area".
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It is hoped that this will make the channel easier to follow for novice boaters.
A spokeswoman for the Broads Authority said: "Most people will not notice the change, but we go through the formal process of notifying users for even the smallest of changes.
"The additional channel markers are between the existing markers, again to help less experienced boaters follow the channel."
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