"...If, based on local reports, you are concerned about the Potato Island channel, then take the alternative Waubashene Channel, which is twisty but deeper. The Waubaushene Channel doesn't appear to be shown on the Jeppeson chart, but is shown on the paper chart and on the raster electronic charts published by CHS. It is well marked with buoys." J.E. The Waubaushene Channel is well marked, but very difficult to identify the channel marks against the setting sun late in the day, after you clear Mary Rocks. The Turning Rock light is readily identified. Add the threat of a late afternoon thunderstorm, and this becomes a very memorable event! Been there done that. I would encourage you to use this channel earlier in the day if at all possible, especially your first time through westbound. Marilyn "Adena"