Where are the only significant shoals dangerous to navigation found on Lake Ontario?

The correct answer indicates that the only significant shoals dangerous to navigation on Lake Ontario are located at the northeast end of the lake. This area is known for having underwater hazards that can pose risks to vessels, especially for larger boats or those operating at higher speeds.

Geographic and environmental factors contribute to the formation of shoals in this area, including sediment deposition patterns and water flow dynamics. Boaters should be particularly aware of these shoals when operating near the northeastern end of Lake Ontario, as they may not be readily visible above water and can create a significant danger to navigation.

Understanding the location of these hazards is crucial for safe boating practices, allowing vessel operators to plan their routes accordingly and ensure that they avoid areas where shoaling occurs. This knowledge is part of the necessary training for navigating the lake safely.