Definition
Display Base is the permanently displayed minimum, including the coastline, safety contour, own-ship safety-related isolated dangers and traffic routeing elements, and cannot be removed. Standard Display is the default power-up set, adding drying areas, cautionary areas, fixed and floating aids, prohibited areas and chart scale boundaries. All Other adds spot soundings, submarine cables, seabed nature, contour labels and similar detail. Reducing below Standard raises a permanent indication that the display is not standard.
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