A squall at sea; they came up fast. Horizons only four kilometers away didn’t help matters; and the winds on Mars had never slowed down much, in all the years of thickening. Underfoot the boat shuddered as it smashed through some invisible fragments of ice. Brash ice now, it appeared, or the broken pancake ice of a sea surface that had been about to freeze over in the night; difficult to spot in all the flying foam. Occasionally he felt the impact of a larger chunk, bergy bergs as sailors called them. These had come through the Chryse Strait on a current from the north; now they were being pushed against the lee shore of the southern side of the Sinai Peninsula. As the boat was too, for that matter.