Walt wrote:
A lake I sail on added a dam that raised the water level 3 feet. So the
easy answer to where the shoals are is: "the shoals are where the
islands used to be."


While sailing thru an area of innumerable shoals with twisty
channels between them (and current, of course), my wife once
made a remark I considered hysterically funny at the time,
but have since realized was very wise:

"Good thing it's low tide, now we can see where the shallow
spots are."

DSK