The Marshfield Coastal Coalition set goals for 2013 at its Dec. 18 meeting, according to Chairman Joe Rossi. The group hopes to help Marshfield improve its standing in the federal Community Rating System, which offers discounts on flood insurance based on a community’s flood-plain management. With a better rating, Marshfield residents would get a bigger discount, he said. The coalition also plans to start an online petition to show support for funding sea wall work through the Department of Public Works. The volunteer coalition, founded last year, aims to inform residents about the town’s coastline-related decisions and bring coastal residents’ views to bear. It is modeled in part on the Scituate Coastal Coalition, Rossi said.