We have paddled several times from Washington Park near Anacortes up to Cypress Island, which requires crossing a busy ferry lane. We watch the ferry schedule and have not had a problem but out in the middle of the 3-mile crossing I always wonder where we are relative to the actual ferry lane. The chart shows a ferry lane and I can see my location relative to that line on GPS. But is the line on the chart accurate or just a rough location? And how wide a path on either side of that line do the ferries use? Thanks for any insights.