About Special Marks
Special Marks
Special Marks in maritime navigation serve distinctive purposes that help mariners navigate safely through waters containing unique or temporary hazards. Unlike other navigational aids like cardinal or lateral marks, special marks do not fit into standard categories. Instead, they vary widely in appearance, often featuring specific shapes, colours, or symbols to convey their message.
The purpose of special marks is to alert mariners to unusual conditions or dangers in a specific area. For example, they might indicate the presence of a pipeline, a military exercise area, a swim zone, or an aquaculture farm. Some special marks are temporary and only displayed when needed. Others, like isolated danger marks, remain in place for longer periods.
Mariners rely on special marks to stay informed about the current conditions in their vicinity and make necessary adjustments to their course to avoid potential hazards. These marks play a vital role in ensuring safe navigation, particularly in areas where unusual or dynamic circumstances can pose risks to vessels and their crews.
Chart Symbol
Image
Lights:
If a light is fitted the colour will be Yellow. Any rhythm apart from those used by isolated danger, cardinal, safe water, lateral and emergency wreck buoys