Sis W is 125 feet long and hails from Chicago.  This is one impressive boat.taking up the whole water way. We followed her for about 20 or so miles.  I had concerns about my depth sounder being accurate. The water was shallow that day.  But I had no problem, because “Sis W” ran aground up ahead.  After that, they were so cautious!  So, I just followed them.   I didn’t have a single problem.  I figured, “they’d hit before me.”