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Acceptable data density is specified by the minimum threshold of accepted soundings per area node (e.g. greater than or equal to five (5) sounding per node). 

Data density requirements should also describe meet the threshold percentage of nodes within the grid that are required to achieve this density (e.g. at least 95% of all nodes within the grid shall be populated with the minimum required density - IHO S-44 Edition 6.1.0 - section D.3.2 Sample Density).


  1. Water depth 

  2. Ping rate 

  3. Swath coverage 

  4. Survey speed 

 During During the survey data density should always be monitored such as to avoid any data gaps over area of interest (pockmarks, feature detection, shoals, etc.)