Currents

This represents travel -- by air, land, but mainly by see. The mind's eye says aye-aye captain FUKK. It's not the symbol for a sextant, but the arrows point in directions that say 'its time to git!'

Dimensions:

It might not be a yacht, it might not be a schooner, it might not be a Spanish Galleon, but even a canoe is worth the pirate's eye.