Question 4899 Deck General

The correct answer is C) Pack slush ice. Pack slush ice is the most difficult type of ice to combat and presents the greatest hazard to shipping on the Great Lakes during the winter months. This is because pack slush ice is a mixture of ice crystals and water that can form a thick, slushy layer on the surface of the water. This type of ice is very unpredictable and can quickly change in thickness and consistency, making it difficult for ships to navigate and increasing the risk of getting stuck or damaged. The other options are incorrect because: A) Fast ice is ice that is attached to the shoreline and is generally less of a hazard to shipping; B) Icebergs are not a significant hazard in the Great Lakes region; and D) Slow ice, while still a hazard, is generally less unpredictable and dangerous than pack slush ice.