 HISTORY
  H7797/50--CS-256; VISIBLE WK, (HULL) POSITION SCALED FROM ì
SURVEY IN LAT 38-01-29.6N, LONG 121-48-05.5W(NAD27).
  TP01059/79--REV-CLASS III; VISIBLE WK, APPROX 60M LONG IN E-W ì
DIRECTION, POSITION SCALED FROM SURVEY IN LAT 38-01-29.0N, L