Wind and current

Shyh-yuan Liu syl at
Fri Jul 1 18:38:29 EDT 1994

Now, I'm doing search and rescue of vessel at sea. 
A analysis got under way and the other two wind and current rate about vessel.
Does anyone know how can GRASS store the rate of wind and current in vector map.
and, Does GRASS express in raster map ?
Thanks for your help and suggestion.

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