Definition
Admiralty Digital Publications include e-NP versions of Sailing Directions, Lists of Lights and Lists of Radio Signals, plus TotalTide for tidal predictions and digital List of Lights and Radio Signals applications. Updates arrive by download and are applied without hand correction, which reduces error but creates dependence on a working computer. Under SOLAS, approved digital publications can satisfy carriage requirements provided the system meets the flag state's conditions, usually including a backup arrangement.
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