CODAR Surface Current Maps Improve Coast Guard Search And Rescue Nearest Coastal Site CODAR Currents SLDMB Drifter SAROPS NowSAROPS w/ HFR Surface Currents 2002 UConn-URI 2004 Rutgers

Confidence Random Flight model of dispersion High Confidence (currents) –sigma (1 std dev) = 0.22 knots –Tau (half life) = 264 minutes Low Confidence (currents) –sigma (1 std dev) = 0.37 knots –Tau (half life) = 264 minutes Number of particles = 5000 SLDMB DateTime 22 July Z July Z July Z July Z July Z 96

24 Hours Into Search HYCOM Low Confidence HF Radar High Confidence

48 Hours Into Search HYCOM Low Confidence HF Radar High Confidence

72 Hours Into Search HYCOM Low Confidence HF Radar High Confidence

96 Hours Into Search HYCOM Low Confidence HF Radar High Confidence

Search Area After 96 Hours HYCOM 36,000 km 2 10,500 nmi 2 HF Radar 12,000 km 2 3,500 nmi km 154 km 123 km 100 km