The performance of an expendable temperature a n d v e l o c i t y p r o f i l e r (XTVP) against several indep e n d e n t v e l o c i t y p r o f i l e r s i s discussed. The XTVP o p e r a t e s on t h e p r i n c i p l e s of motional induction r e s u l t i n g from t h e movement of s e a water through t h e e a r t h ' s m a g n e t i c f i e l d . The induced e l e c t r i c c u r r e n t s a r e i n t e r p r e t e d i n terms of t h e g e n e r a t i n g v e l o c i t y d i s t r i b u t i o n . P r o f i l e i n t e r c o m p a r i s o n s have shown t h e XTVP capable of measuring ocean v e l o c i t y ( r e l a t i v e t o an unknown, depth independent o f f s e t v e l o c i t y ) t o w i t h i n an u n c e r t a i n t y of 1 cm/s with 6 m v e r t i c a l a v e r a g i n g f o r b o t h t h e e a s t and n o r t h v e l o c i t y components. White noise density of about 3 . 5 (cm/s)2/cpm limits v e r t i c a l r e s o l u t i o n t o about 10 m. The probe f a l l s a t about 4.5 m/s, requiring about 200 s t o complete a p r o f i l e t o 900 m (3000 f t ) , and has a dynamic range of +400 cm/s. P r o f i l e s and comparison r e s u l t s a r e p r e s e n t e d demonstrating the achievement of t h e development goal of v e l o c i t y u n c e r t a i n t i e s of 1 cm/s nus a t a v e r t i c a l r e s o l u t i o n of 10 m.
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