FAA one (1) hour away from shoreline is ETOPS? Are you sure? For which operations part? 91/135?? Or only for 121?
"For example, an airplane has a calculated non-ETOPS area of 1200 NM (180 minutes [3 hours] x 400 knots =1200 NM). The certificate holder has previously made the ETOPS area calculation outlined in Step 1 and has determined the non-ETOPS area for that airplane. Based on that non-ETOPS area, it is determined that a hypothetical trip from Los Angeles, CA (KLAX) to Maui, HI (PHOG) would remain within the previously calculated non-ETOPS area."
http://www.faa.gov/other_visit/aviation_industry/airline_operators/airline_safety/info/all_infos/media/2008/135ETOPS.pdf