H7089/46--SUBM DOLPHIN; US ARMY TIDE GAGE IN LAT.36-55-40.5N, LONG.76-07-18W  
H9910/80--OPR-D103-MI-80, 1:10,000 SCALE SURVEY; DEL NORTE CONTROL (R/R, R/A);
 ECHO SOUNDER NORTH TO SOUTH W/20M LINE SPACING; NOT ON FATHOGRAMS; NOT SEEN  
 BY LAUNCH PER