 HISTORY
  H7797/50--CS-256; VISIBLE WK, (HULL) POSITION SCALED FROM ì
SURVEY IN LAT 38-01-29.7N, LONG 121-48-07.4W(NAD27).
  TP01059/79--REV-CLASS III; VISIBLE WK, APPROX 80M LONG IN NW-SE ì
DIRECTION, POSITION SCALED FROM SURVEY IN LAT 38-01-28.4N,