 H9910/80--OPR-D103-MI-80; 1:10,000 SCALE SURVEY; DEL NORTE CONTROL (R/R, R/A);
 ECHO SOUNDER; LINE OF 53 STAKES (APPROX. 4" IN DIAM. AND 15' APART) BEGINNING
 INSHORE AND RUNNING NORTH; N END IS SERIES OF STAKES IN SPIRAL SHAPE; A NET  
 CONNECTS ALL