Immediate report if the ice thickness fails below, say, eight or nine feet.

Studies have shown that the average ice thickness has decreased in recent years.

Part of the exercise was being used to measure ice thickness by using sonar.

As a result, since 1990 the ice thickness has occasionally increased.

This time it reported the most frequently recurring ice thickness at 0.9m compared with 2m in 2001, which corresponds to the long-term average.

This implies that the instrument will supply at least some information on ice thickness.

Ice fishing is popular, but ice thickness must be monitored by the user.

These measurements, taken over decades, could reveal changes in ice thickness caused by temperature shifts.

He had read that environmental scientists were unable to tap Navy data on polar ice thickness and sought to bring the two sides together.

It is mostly used in conditions where ice thickness is limited.