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Higher High Water (VDC_3)

DGIF baseline 2026-1, the latest. Earlier baselines: timemap.

RDF: vdc_3.ttl

Name

higherHighWater

Attribute

VDC Sounding Datum

Definition

The highest of the high waters (or single high water) of any specified tidal day due to the declination A1 effects of the moon and sun.

Synonyms

HHW

Accepted

2013-10-18

Allowed for

• ZI012 Sounding Metadata

Source: DGIF 2026-1 QEA model, DGIWG. Standard: DGIWG 206-3. Licence: CC BY 4.0, © DGIWG.