#1: The closest approach
#2: A map of the confluence region
#3: Refueling the taxi
#4: Zárate
#5: Puente Bartolomeu Mitre
#6: 34°S
#7: GPS
#8: Navigation on Rio de La Plata
#9: Navigation on the Rio Parana
#10: 1507 document claiming the Rio de La Plata to be the "passage"