Unless you have a boat or can swim really well, you won't be able to get to the posted coordinates. And if you get there, you will find no cache.
Finding the real coordinates of the cache will require a little bit of research. All answers can be found on the Internet.
All caches are located on an easily walkable power line trail. Depending on the weather, rubber boots may be required on a couple parts of the trail.
To find the coordinates for this cache, use the following format:
N 47o AB.CDE
W 052o GH.JKL
All according to the Wikipedia entry for Accordion:
AB = The book "Schule fur Accordion" was written in 18_ _.
C = The accordion is believed to be invented in Berlin in 1_22 by Christian Bushmann.
DE = The schwyzerorgeli or Swiss organ usually has 3-row diatonic treble and _ _ unisonoric bass buttons in a bass/chord arrangement. Add 40 to the number.
GH = Charles Wheatstone squeezed both the chord section and the keyboard section together into one squeezebox and patented it in 18_ _. Add 4 to the number.
JK = The Accordion appeared in Britain by 18_ _. Add 10 to the number.
L = An instrument called the accordion was first patented in 18_9 by Cyrill Demian. Subtract 2 from the number.
Cache is a nano containing a log only. Please bring your own pen.
You can check your answers for this puzzle on GeoChecker.com.