NATIONAL GEOSPATIAL-INTELLIGENCE AGENCY
US456670 - PALAU - HELEN REEF
 
INDEX:
TIDAL INFORMATION
CAUTION

NOTES: 
TIDAL INFORMATION:
Mean H.W. Interval...7hrs. 7min.; Spring Rise...1.8 meters; Neaps Rise...1.2 meters; Mean Tide Level...0.9 meters

CAUTION:
QUALITY OF BATHYMETRIC DATA - The areas represented by the object M_QUAL (Quality of Data) are approximate due to generalizing for clarity. Caution is advised, particularly for nearshore navigation or voyage planning. M_QUAL represents areas of uniform quality of bathymetric data. The CATZOC (Category of Zone of Confidence in Data) attribute of M_QUAL provides an assessment of the overall zone of confidence.

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