HISTORY
UNKNOWN SOURCE--DANG. SUNKEN WK, FIRST CHARTED IN 1967. SCALED AT 1:20,000 IN 
 LAT.37-46-41N, LONG.122-14-32N.                                              
H9927/81--OPR-L123-PHP-81, ITEM 20; VISIBLE WK UNCOVERS AT SOUNDING DATUM,    
 DETE