NEW ZEALAND HYDROGRAPHIC AUTHORITY

TONGA

INDEX:
AIDS TO NAVIGATION
SATELLITE DERIVED POSITIONS
FISH AGGREGATING DEVICES (FADs)
CURRENTS


AIDS TO NAVIGATION
The aids to navigation shown on this chart are not to be relied upon.

SATELLITE DERIVED POSITIONS
Positions obtained from satellite navigation systems referred to WGS 84 Datum can be plotted directly onto this chart. Caution must be exercised in the transfer of geographical positions to other charts not in terms of WGS 84 Datum.

FISH AGGREGATING DEVICES (FADs)
Mariners should exercise caution as FADs have been moored at inshore and outlying locations. Some FADs may show flashing lights and are painted orange: concentrations of fishing vessels may be found in their vicinity.

CURRENTS
The South Sub-Tropical Current predominates over the whole area of this chart, with generally west to south-westerly sets of up to a knot in rate. Sets are however variable. In the shallower water and near the island coasts currents will be greatly influenced by the wind, and will tend to follow the trend of the coasts. For further information, see Admiralty Sailing Directions.


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