Whatever Floats Your Boat? Mystery Cache
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Whatever Floats Your Boat?
A cache by [DELETED_USER]
Hidden
:
10/8/2013
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Difficulty:
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Terrain:
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Size: 
(micro)
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A boat like the one above (but not much) has a rope ladder hanging over its side.
The rungs are 230 mm apart.
How many more rungs will be underwater when the tide has risen one metre?
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Additional Hints
(Decrypt)
onfr/Nyy Pncf.