When I got the paper charts for Iceland I had a lot of fun imagining what it would like to sail in those waters.
But there was one feature that caught my eye, a white blankness. It wasn't a glacier but that rare beast, areas that had never been surveyed - literally uncharted waters.
In our world where Google Earth can spin you close up to a mountain in the middle of Antarctica, where an Iridium satellite phone will work from pole to pole and Wikipedia can answer questions you never thought to ask, the unknown has a strange power.
Here be dragons, mermaids, sea monsters or possibly Donald Rumsfeld (shiver).
I went to the bow to watch for rocks in the rich green waters below us: while fjords are typically deep there are moraines, which is where the glacier dumped its rocks. These shallows can represent a bar preventing ships from travelling further up, and indeed we spotted the depth of water under the keel drop to 4.5m for a while before returning to a more typical 20m.
Maybe we should have spent the afternoon there, criss-crossing, taking bearings and depths - which is no doubt what a Captain Cook would have done - but instead we documented our explorations the modern way.
Using the iNavX software running on the iPhone and iPad I recorded our track for posterity:
Then Tristan handed the tiller to me and I helmed us out, back into the well mapped modern world, and a debate as to whose watch it was next.
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