The search on Lake Lanier for a Mableton man who went missing early Saturday and is presumed to have drowned will be scaled back today.“(T)he Hall County Sheriff’s Office and the Georgia Department of Natural Resources will be reducing the resources devoted to search operation for Jeffrey Nause, who was reported missing from a sailboat,” sheriff’s office spokesman Sgt. Stephen Wilbanks said Wednesday in a press release.Surface and sonar searches will continue through Sunday, but dive operations will be on standby. Hall County divers will conduct training and certification updates for the next two days; if surface searches produce a target, they will investigate further.“Dive operations will be suspended for the weekend due to heavy boat traffic, but surface/sonar searches will continue through Sunday,” Wilbanks said. “Continuation of the operation will be reassessed prior to Monday.”The search area covered more than 20 square acres, with depths ranging from 70-130 feet and water temperatures of 42 degrees at depth.