The cloud ceiling lifted to reveal the Transantarctic Mountains, which provided a stupendous backdrop to our activities for the day. Our intentions to land at Inexpressible Island were thwarted by an impenetrable crust of frozen sea spray that encased the entire coast of the island. Since it was too dangerous for walking, we Zodiac-cruised instead. The afternoon was spent cruising the eastern tip of a 43-mile-long glacial tongue: Drygalski Ice Tongue.