NVC0901 Maritime Alliance Symposium San Diego, August 2011 By: Michael Broadbent Fugro Pelagos Inc. Seafloor Mapping Technologies

NVC0901 Fugro Overview Fugro is an international surveying, geosciences, and geotechnical services company that collects and interprets data about the earth’s land masses and oceans. –Large company with true global reach –Extensive and innovate capabilities –Unique world wide operational experience –Sole focus on mapping our planet

NVC0901 Uses sound (sonar) pulses to map the seafloor Improvement on single beam (profiling) sonar Methods and sensors able to map the deepest parts of the seafloor Variable swath width (width vs. detail) Some sensors capture backscatter intensity (snippets) allowing imaging of the seafloor Multibeam bathymetry creates swathes of survey data that map underwater surfaces and features Vessel Based Multibeam Surveys SBMBWA

NVC0901 INTACT PIPELINE Underwater Infrastructure

NVC0901 Bathymetric Port/Harbor/Coastal Chart

NVC0901 Sonar Backscatter (Side-Scan or Snippets) Side-scan sonar (or snippets) can be utilized for creating an image of the floor of the water body/water course. Data collected can help identify the composition and texture of the seabed/lakebed/riverbed. Rock Piles Ship Wreck

NVC0901 Variety of different seismic systems for shallow and deep water investigations. Provide valuable information regarding the sub-bottom geology for dredging or construction applications as well as evaluating sediment transport issues. Marine Geophysics – Seismic Reflection

NVC0901 Marine Geophysics Different seismic sources: chirp, boomer or spark Different receivers: single/multi-channel Data interpreted with core samples to produce geological maps

NVC0901 Autonomous Underwater Vehicles Often designed for surveys down to 10,000’ below sea level Offer the most detailed surveys of deep seafloor Vessel deployed or land deployed Variable sensor packages including: Bathymetric survey Sidescan Sonar Geophysical Profiling

NVC0901 AUV Deep Water Advantages: Bathymetric Survey Better Bathymetry Data in Deepwater Hull-mounted vs. AUV Multibeam data

NVC0901 Breakwater Survey: San Pedro, California Angel’s Gate Lighthouse

NVC0901 Port Infrastructure

NVC0901 Offshore Platforms & Terminals Annual Inspection Hurricane Damage Pre/Post Retrofit Clash Detection Decommissioning

NVC0901 Airborne LiDAR Bathymetry Airborne Bathymetric LiDAR –Uses green and NIR laser –Green laser penetrates the water column to 2 x Secchi depth –Measures timing and intensity of returned laser pulse –Simultaneous digital imagery –Reduced risk, time, and cost compared to vessel based hydro surveying –Requires clear water to operate –Scans at 1 KHZ side to side to produce swath coverage

NVC0901 Airborne LIDAR Bathymetry Operational Concept

NVC0901 CMP USACE NCMP (1,000 m)…………..Hydro & Topo………(500 m) Hydro – waterline to 1,000 m Topo – waterline to 500 m 20 cm resolution Hyperspectral Hydro – waterline to 1,000 m Topo – waterline to 500 m 20 cm resolution Hyperspectral West Coast LiDAR Mapping

NVC0901 Lidar Bathymetry Reflectance

NVC0901 Jizan, Kingdom of Saudi Arabia

NVC0901 Conclusion Right Tool for the Right Job: –Each project will have demands appropriate for a different survey technology Integrated Interpretation Strategy: –Many features can only be properly characterised by the use of multiple data types

Thank You! Contact info: Michael Broadbent