HISTORY
CL280/78--CAS18654 (1977)-OPR-511-DA77, ITEM 27: DUCK BLIND, SEXTANT POS.     
 LAT. 38-01-49.84N, LONG. 122-28-18.38W. NOS BLUEPRINT 103245.                
H10082/83--OPR-L123-RA-83; DUCK BLIND NOT DISPROVED. RETAIN AS CHARTED        
 (UPD