That's good fishing tackle! Mystery Cache
That's good fishing tackle!
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Difficulty:
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Terrain:
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Size: 
(micro)
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The cache is NOT at the posted coordinates, but it is somewhere in the land of N38/W121. Solve the puzzle (N38 AB.CDE, W121 FG.HJK) to find the location of the physical container (my 400th hide!).
I recently attended a Florida event where the host, fishnfla, gave a sweet tool of geocaching "fishing line" to each event attendee. That was so generous! As a thank-you, here's a puzzle that celebrates geo-fishing and fishnfla.
North
The first-ever hide from fishnfla was Take a kid fishing, hidden in the month of 0A/200F.
The Lunker may have been the first time I ever saw a fishing cache; that now-archived cache had around B0 found-it logs.
A friend of mine likes to say that Size Does Matter When Fishing or Caching. That geocache is also known as GC4JHX?, where the numeral that replaces the question mark is C.
A prolific hider, fishnfla's top year of finds through his first 12 years was 2011, when he found D17 geocaches.
In fishnfla's first 12 years of caching, he had two calendar-year find totals within one of each other; those counts were 1E3 and 1E4.
West
Fishnfla has been a member since 200F.
And he celebrates his cache-a-versary on the 7th day of month #G.
Through December 2017, his busiest month finding was when he found H77 geocaches.
The first-ever multi-cache hide from fishnfla was The Original South Beach; its waypoint ID or "GC code" is GCJK?D, where the numeral that replaces the question mark is J.
CachingRednecks has an "Old Ice Box" geocache that has "fishing" in its title. The numeral in its title is K.
You can validate your puzzle solution with certitude.
Additional Hints
(No hints available.)