pack-ice

He said that moving the tanker even with the help of the cutter through more than 300 miles of pack-ice was a "very profound obstacle."

Nome, Alaska To Reconnect With World When Renda Tanker Delivers Fuel 2012

Unique among Arctic land mammals, these giant bears spend most of their time near water hunting for fish and seal, traveling deep into pack-ice regions to find their prey.

Arctic 2010

In the first place, the distance to the nearest inhabited country is very great -- over 2,000 geographical miles -- and in the second, there is a serious obstruction on this route in the shape of the belt of pack-ice, which, narrow and loose as it may be at times, will always necessitate the employment of timber-built vessels for the work of transport.

The South Pole~ The Eastern Sledge Journey 2009

In 1914 British explorer Ernest Shackleton's Imperial Trans-Antarctic Expedition set out with the goal of crossing Antarctica via the South Pole, but his ship, the Endurance, was frozen in pack-ice and sank 11 months later.

South Pole Wikipedia 2009

In the course of the winter and spring the pack-ice is forced up against the Barrier into pressure-ridges of as much as 40 feet in height.

The South Pole~ The End of the Winter 2009

In that part of the voyage which we now had before us -- the region between the Australian continent and the Antarctic belt of pack-ice -- we were prepared for all sorts of trials in the way of unfavourable weather conditions.

The South Pole~ From Madeira to the Barrier 2009

The meeting with the imposing colossus had another significance that had a stronger claim on our interest -- the pack-ice could not be far off.

The South Pole~ From Madeira to the Barrier 2009

What we had to do was to get as quickly as possible through the belt of pack-ice that blocked the way to Ross Sea to the south of it, which is always open in summer.

The South Pole~ From Madeira to the Barrier 2009

On this trip we reached the edge of the pack-ice belt three days after leaving the Barrier.

The South Pole~ Northward 2009

This left not much more than 900 miles before we might expect to meet with the pack-ice.

The South Pole~ From Madeira to the Barrier 2009