1. Project Update and 2014 Plans Jack Riley and Bryan Murray, HSTP

2. System Description Iridium Antenna GPS Antenna 160 lbs. ~2 ft. diameter (0.6m) Easy to deploy & monitor Batteries for ~45 days Nominal waterline at rubber “bumper” 26-lbs. Danforth 3x 8-lbs. mushrooms

3. Comparison Project “Noise” Mobile Bay Lower Chesapeake Bay Upper Chesapeake Bay Puget Sound Tidal Signal Key Results <1 centimeter mean difference between buoy and NWLON MLLW water levels (3 deployments) 3-6 centimeter standard deviation of buoy-to-NWLON differences Buoy hardware vulnerabilities exposed and fixed Best Results

4. Port Townsend, Puget Sound Key Results 1 mm mean difference between buoy and NWLON MLLW water levels 2.5 cm standard deviation of buoy-to- NWLON differences

5. Applications Tide Zone Refinement TCARI grid offshore boundary definition VDatum verification

6. 2014 Field Season Cape Charles, VA April-June Buoy 1: Offshore Deployed from Ferdinand Hassler VDatum validation Buoy 2: CBBT Near CBBT NWLON gauge CO-OPS to install bottom- mounted ADCP for high- frequency, localized current data 2 1

7. 2014 Field Season Kodiak Island, AK August-October Rainier, OCS-XX-XXX Buoy 1: Near project- installed tertiary gauge in protected bay Buoy 2: Mouth of same bay? Another tertiary gauge (co)location? 2 1

8. Medium-Term Plans HSTP to maintain ownership CO-OPS, in parallel, is investigating buoys expressly for tidal datum recovery Locations/projects to be determined via joint consultation between HSD, CO-OPS, & VDatum team Deployments by hydrographic fleet, HSTP support as necessary Data processing jointly by HSTP and hydro survey crew Applanix POSGNSS + Pydro tools Develop agreements with CO-OPS and VDatum team to define deliverables and timelines