In the sixteenth century, Juan Sebastián de Elcano brought the ship
Victoria, the only surviving vessel in Magellan's fleet, back to
Spain. His crewmen were the first to circumnavigate the Earth.
Emperor Charles V gave him a globe with the inscription "Primus
circumdediste me" ("You were the first to encircle me.")
What year did the fleet leave? Call that AAAA.
Let XXX = AAAA - 1496.
In the twentieth century, Frank Borman, James Lovell, and
William Anders, the crew of Apollo 8, were the first to
circumnavigate the moon. On Christmas Eve, they sent home stunning
photos and video of Earthrise over the moon, demonstrating just how
small and fragile our planet really is.
What year did Apollo 8 leave the Earth? Call that BBBB.
Let YYY = BBBB - 1473.
Now it's your turn for circumnavigation. The cache location
is:
N 45 25.XXX
W 122 43.YYY
The terrain difficulty varies from 1.5 to 4.5 depending on how
heavy the flow is. Do not bring small children or animals. If you
find that the flow is high, please come back at another time when
conditions are less dangerous.
The cache container is a micro. There isn't enough room for a
writing utensil, so please bring your own.