ANNEX Ab b IHO ECDIS PRESENTATION LIBRARY The Presentation Library is published separately. See Figure 1 for details. In summary the Presentation Library implements the display specifications in S by decoding and symbolising the SENC. It contains 1. the ECDIS symbol library, including the IEC navigation symbols, 2. the ECDIS colour tables for day, dusk and night viewing, 3. lookup tables with symbology instructions linking SENC objects to the appropriate colour and symbol and giving their IMO category, draw priority, priority over radar, and suggested viewing group, 4. conditional symbology procedures for - cases where symbolising depends on circumstances such as the mariner's choice of safety contour, - cases where symbolising is too complex to be defined in a direct lookup table, 5. symbolising instructions for special cases which are not handled by 3. or 4. above, such as north arrow and scalebar, manual chart corrections, etc, 6. description of the symbology instructions, 7. mariners' navigational objects, specified in the same format as chart objects for convenience in processing by the ECDIS, 8. supplementary features such as the ECDIS Chart 1, colour differentiation test diagram, colour calibration software. The IHO Presentation Library is part of the S package. A digital version is also available for edition 3.4; updating this digital version will depend on a volunteer provider. __________
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