Which would be the BEST condition for your...

🔍 Key Concepts

• Behavior of a ship in ice – how trim (by the bow vs by the stern) affects how the hull rides up on or cuts into ice • Forefoot and bow shape – what happens if the bow is too deep vs too light in the water when meeting pack ice • Even keel vs trim – advantages and disadvantages of being level versus slightly trimmed when encountering resistance ahead

💭 Think About

• Think about whether you want the bow to ride up on top of the ice or to punch straight into it. Which trim condition best supports that behavior? • Consider what could happen to the forefoot and bottom plating if the ship is too deep by the head when it makes contact with thick ice. • Which option would reduce the risk of concentrated impact loads on the forward bottom structure while still giving you enough control and propulsion in ice?

✅ Before You Answer

• Compare how each trim condition (even keel, by the head, by the stern) changes the depth of the forefoot below the surface • Ask yourself which condition minimizes the chance of severe damage to the bow and bottom plating when first contacting ice • Verify which option would help the vessel ride up and break ice rather than becoming wedged or taking heavy bottom impacts

Which would be the BEST condition for your vessel to enter into pack ice?

The vessel is ballasted so the forefoot is near the surface

The vessel is on an even keel

The vessel has a drag of not more than 2 to 3 feet

The vessel is trimmed slightly by the head

🔍 Key Concepts

💭 Think About

✅ Before You Answer