As boaters take to the water in droves, one captain, as he styles himself, is hoping his Lake Lanier business stays afloat in the minds of boaters who drink alcohol in America’s honor. “It’s our busiest weekend, provided people are smart enough to use the service,” said Jeff Perfater, founder and owner of SAFENAV. The business model: Dispatch a U.S. Coast Guard-certified master captain to rescue stranded imbibers. For $125, Perfater or a member of his team will show up on a small craft, then pilot operators and their passengers to dry land.