  H9959/81--OPR-D103-MI/PE-81; ARGO R/R CONTROL; 55FT SHOAL SNDG. OBTAINED BY   
ECHO SOUNDER DURING ROUTINE MAINSCHEME HYDRO. FURTHER INVEST., CONDUCTED VIA 
10M ECHO SOUNDER LINE SP. AND BY DIVERS, PROVIDED RESULTS THAT REVEALED A    
BARGE LYING ON