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                                   BULLETIN
                         FSB-003 - ANTIFOULING GREASE
                  DATE/REV:  12APR89 / 0 (previously FSB 1-3)
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ABSTRACT:  Describes antifouling grease problems.

INSTRUMENT/PROGRAM AFFECTED:  All ADCPs using antifouling grease.

DESCRIPTION:  The antifouling grease (Nopcocide) supplied by RDI to protect
the transducers against biofouling can lead to drying and cracking of the
urethane coating on the transducers.  A crack may eventually develop into a
leak.  Exposure to sunlight and high temperatures accelerate the problem.

SOLUTION/ACTION:  When using antifouling grease, be sure to remove all the
grease when you remove the transducer from the water for service.  RDI is now
looking for antifouling grease (Nopcocide) substitutes.

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