Geocaching game -- 2nd clue

A post yesterday announced the game. See Geocaching in Midland, TX -- a PRIZE!.

No winner has come forward yet, so here's the next clue.

Clue #2: Earth day 1992.

The first person who emails me the secret word will win the prize, subject to the excluded persons rule set out at the above link.

The third clue, if needed, will involve dead reckoning. Actually, it's straight line navigation, but dead reckoning has such a sound to it.