Anchor the boat fore and aft as far away from structure, such as a suspended weedbed, as you can cast. Using a heavy sinking line, make a long cast. Strip out 10 feet of line and shake it through the tip-top guide. Drop your rod tip to the water—and do nothing. The line will sink to form an underwater L, dropping straight from your rod tip and then extending out toward the structure. “Count down, say, 10 seconds before starting a retrieve,” Tracewski says. “The belly of the line will pull the fly through the sweet spot until it is nearly to the boat.” If you don’t get a hit, cast again and count down to 15 seconds before retrieving, then 20 and 25.