A tabular berg about fifty feet high ten miles west is a good index of the amount of refraction.

On ordinary days it shows from the mast-head, clear-cut against the sky; with much refraction, the pack beyond at the back of it lifts up into view; to-day a broad expanse of miles of pack is seen above it.

Numerous other bergs generally seen in silhouette are, at first sight, lost, but after a closer scrutiny they appear as large lumps or dark masses well below the horizon.

Refraction generally results in too big an altitude when observing the sun for position, but to-day, the horizon is thrown up so much that the altitude is about 12ｴ too small.

No land visible for twenty miles.