Which of the following is NOT typically represented by Special Marks?

Special Marks in the IALA Maritime Buoyage System are used to indicate features or areas of distinct significance that don't fall under the typical navigational aids such as channel markers or safe water buoys. These marks provide information regarding specific locations to mariners but are not involved directly in navigation.

Recreation Zones, Mooring Areas, and Cable and Pipe Lines are all categories that are commonly associated with Special Marks. Recreation Zones might indicate areas where vessel traffic is restricted or where certain activities, like swimming, take place. Mooring Areas mark designated locations for vessels to securely anchor. Cable and Pipe Lines are marked to alert navigators of underwater utilities that should be avoided.

On the other hand, Important Navigational Routes are more likely to be indicated by conventional marks (like lateral or cardinal marks) which are crucial for guiding mariners through safe passage areas. These navigational routes do not fall under the realm of what Special Marks typically represent, as they focus more on specific features rather than general navigation paths. Therefore, the identification of Important Navigational Routes as NOT typically represented by Special Marks is accurate.