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National Ocean Service
NGS, NOS, NOAA
Real-Time GPS Positioning of Ships To Real-Time GPS Positioning of Ships To Integrate Navigation ServicesIntegrate Navigation Services
David B. ZilkoskiNational Geodetic Survey
Silver Spring, Maryland [email protected]
National Ocean ServiceNational Ocean Service
Vision:Everyone is able to knowwhere they are and where
other things areanytime, anyplace!
The mission of the
National Geodetic Surveyis to deliver and evolve the nation’s foundation of reference for latitude, longitude, height, velocity, shoreline, and gravity throughout the United States with consistency, accuracy, timeliness, currency, and easy access to support public safety, economic prosperity, and environmental well being.
Check out our Website http:\\www.ngs.noaa.gov
National Ocean Service
NGS, NOS, NOAA
Promoting Safe NavigationPromoting Safe Navigation
• The key to safe navigation is accurate positioning.
• To navigate safely mariners not only need to know where they are but at the same time they need to know where the things around them are.
National Ocean Service
NGS, NOS, NOAA
Integrated Navigation Services• NOAA proposes a navigational service that uses GPS and NSRS to
provide the mariner with an integrated suite of decision making tools.
• The goal of the proposal is to increase the capacity of American ports by providing them with the entire suite of pertinent NOAA data products.
• These products will be provided to the mariner digitally, in real time, and will be complete, accurate, and up-to-date.
National Ocean Service
NGS, NOS, NOAA
Phases of the Demonstration ProjectPhases of the Demonstration Project• Demonstrate the feasibility of using GPS to determine
accurate GPS heights on large marine vessels
• Acquire information to describe the location and shape of the channel, shoreline, and docking areas in the GPS coordinate system
• Relate the ship to the bottom of the channel, shoreline, and docking areas
• Integrate real-time GPS positioning of ships with electronic charts
National Ocean Service
NGS, NOS, NOAA
3-D Positioning of Marine Vessels using GPS3-D Positioning of Marine Vessels using GPS
GPS AntennasGPS Antennas
National Ocean Service
NGS, NOS, NOAA
3-D Positioning of Marine Vessels using GPS3-D Positioning of Marine Vessels using GPS
Equipment used for GPS height and
altitude measurement on an ATD
Equipment used for GPS height and
altitude measurement on an ATD
National Ocean Service
NGS, NOS, NOAA
3-D Positioning of Marine Vessels using GPS3-D Positioning of Marine Vessels using GPS
Container ship with ATD mounted on top containerContainer ship with ATD mounted on top container
National Ocean Service
NGS, NOS, NOAA
3-D Positioning of Marine Vessels using GPS3-D Positioning of Marine Vessels using GPS
Layout of GPS equipment on container shipsLayout of GPS equipment on container ships
National Ocean Service
NGS, NOS, NOAA
Relating Height Information to GPS• Determine heights relative to local mean
sea level surface using tidal observations
• Determine bathymetric heights relative to the ellipsoid using GPS
• Occupy tidal stations with GPS
• Occupy NAVD 88 Bench Marks with GPS
National Ocean Service
NGS, NOS, NOAA
Relating Tidal Information to GPS
National Ocean Service
NGS, NOS, NOAA
Water Level Values in the Middle of the Channel
National Ocean Service
NGS, NOS, NOAA
Bridge Vertical Clearance Using GPSBridge Vertical Clearance Using GPS
NGS provided the Port of Charleston with elevations to determine vertical clearances for large marine vessels navigating beneath two bridges. The clearances were determined using a combination of geodetic data: satellite GPS data, classical leveling observations, and specially designed trigonometric
leveling techniques.
NGS provided the Port of Charleston with elevations to determine vertical clearances for large marine vessels navigating beneath two bridges. The clearances were determined using a combination of geodetic data: satellite GPS data, classical leveling observations, and specially designed trigonometric
leveling techniques.
GPS AntennasGPS Antennas
National Ocean Service
NGS, NOS, NOAA
Digital Docking Charts and ShorelineDigital Docking Charts and Shoreline
National Ocean Service
NGS, NOS, NOAA
Computer Screen on the Bridge of the Ship
National Ocean Service
NGS, NOS, NOAA
NOTE: Clearance
is 0.6 m
NOTE: Clearance
is 0.6 m
National Ocean Service
NGS, NOS, NOAA
ConclusionConclusion
• NSRS provides the spatial consistency needed to relate objects to one another.
• GPS provides the capability for acquiring positional data, techniques developed by NOAA provide the capability for achieving the levels of positional accuracies required.
