How do I safely navigate Coatsworth Cut and shallow water hazards when entering Lake Ontario from Ashbridges Bay Boat Launch?

Detailed answer

Navigating Coatsworth Cut from the Ashbridges Bay Boat Launch to Lake Ontario requires strict attention to shallow water hazards and seasonal depth variances. The cut is notoriously shallow, with charted depths averaging around 4 to 5 feet in the center channel during the summer boating season. However, during late summer and early fall, water levels frequently drop, reducing the channel depth to as little as 2.5 feet at the mouth where it meets Lake Ontario. Sandbars and silt accumulation frequently shift, particularly near the eastern breakwater. Boaters must strictly adhere to the red and green buoy markers that delineate the safe passage; never cut the buoys too closely, as shoaling often occurs just outside the marked boundaries. A reliable depth sounder is essential, but visual scanning is equally critical—look for breaking waves or discolored water, which indicate shallow shoals. Maintain a slow, no-wake speed to retain steering control and minimize the risk of running aground. Vessels with deeper drafts or sailboats with extended keels should time their passage during peak water levels, typically in the spring or early summer, and strictly avoid the cut during strong easterly winds, which push water out of the bay and further reduce depths by up to 1 foot.