enhanced safety through the use of real-time …
TRANSCRIPT
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ENHANCED SAFETY THROUGH THE USE OF REAL-TIME DYNAMIC
CHARTS OVERLAYS
Captain Jonathon PearceBusiness Development Manager
4th CMPA CongressNiagara Falls
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Dynamic UKC Factors Review
SOMS UKC Concept Study
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Recap: Dynamic UKC (DUKC®)
• Provides a consistent scientific approach to UKC management
• Utilises near real time and forecast environmental data (tides, waves, currents) and uses sophisticated ship modelling to calculate ship motions and UKC
• Rigorous application of PIANC guidelines and limits
• Effective mitigation of grounding hazards
• Implements a shared picture between ship and shore
• Extensive full-scale DGPS validation (>300 vessels)
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Primary DUKC® Outcomes
• Enhanced decision making with transit plan accuracy
• Detailed reports Improved Master/Pilot Information Exchange
• Enhanced vessel scheduling/reduced channel conflicts
• Enhanced contingency planning
• Removes commercial pressures
• Maximises productivity and efficiency and
• Increased economic benefits
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Win/Win - Productivity & Safety
• OMC’s evidence from existing studies show:
• 95% existing static rule conservative
• Potential for draught increases and/or productivity gains through increased tidal windows
• 4% existing static rule marginal
• Potential for a touch bottom incident. High risk but actual risk never quantified
• 1% existing static rule unsafe
• Very high potential for a touch bottom incident
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Under most conditions a static rule will be conservative
However, groundings can occur when a ship is sensitive to the prevailing conditions (this is actual data!)
Case Study - Failure of Static Rule
A static rule won’t tell you when this is the case!
Conservative (95%)
Marginal(4%)
Unsafe(1%)
Marsden Point NZ, Groundings: Eastern Honor & Capella Voyager 2003
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What is DUKC®? An example
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Planning and Monitoring
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Problem to be addressed
• How to deliver this data to a vessel/pilot in an easily understandable format
• Be integrated with navigation systems BUT must not detract from primary navigation requirements
• Use recognised concepts - GO/NO GO areas
• Still be available remotely (web) in case of failure
• Infrastructure required
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Solution – Chart Overlays
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DUKC® Chart Overlay
Marine Information Overlay for UKC
ECS dynamic depth contours DUKC® Chart Overlay
Based on static UKC allowance Based on dynamic UKC calculation
Shows live go / no-go Shows predicted go / no-go for ETAs, speeds and conditions along route
Dependant on resolution of ENC bathy Uses latest locally-sourced high resolution bathy
Computed on-board Computed on-shore and transmitted to vessel. Integrates environmental feeds.SHARED PICTURE VTS/VESSEL(pilot)
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Delivery – Partners
OMC International – DUKC system and overlaysQPS – Qastor Connect server and navigation softwareNavicom Dynamics – PPU’s
Australian Hydrographic Services – Hydrographic servicesTelstra – 3G network and dedicated broadband services
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Chart Overlays
Methodology1. High-resolution bathymetry of transit area
2. Create 2D Grid overlay (10m x 10m)
3. Compute DUKC® predictions of minimum keel elevations
4. In each grid cell compare the (nearest adjacent) predicted keel elevation with the depth at this location
5. Mark each grid cell as “pass” or “fail” (go/no go)
6. Produce real-time overlay (Web)
7. Promulgate overlay to users ECDIS/PPU
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measured tide & currents
measured waves
measured wind & pressure
ship in given load state
latest sounded depths
8
ship speed envelopesastronomical tides
DUKC® Methodology
NOTE: Minimum depth anywhere in the DUKC®
“Bathymetry Node”
Minimum Keel Elevation
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High-resolution bathymetry grid
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Computing the 2D overlay
High resolution sounded depths
Minimum depth
10m x 10m overlay grid
DUKC®
Bathymetry Nodes
Compare DUKC® minimum keel elevation to overlay grid
cell depth
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Chart Overlay Generation
Due to dynamic components:• Overlays are
unique to a vessel• Multiple vessels =
multiple overlays
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Go – No Go (High Tide / Low Tide)
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Dynamic Tide Contours Issues
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Dynamic Tide Contours
Problem:This shows the state of tide now.
What is the actual tide be during transit?
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Dynamic Tide Contours
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Dynamic Tide Contours
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Dynamic Tide Contours
Dynamic
but not
Predictive
Only
displaying
real tide
heights(via AIS or 3G
networks)
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Predictive Tidal Plane
Composite tidal plane for whole
transit
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Predictive Tidal Plane
With
Overlay
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Predictive Tidal Plane
With
Overlay
Draught
and
dynamic
motions
applied
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Predictive Tide Contours
With
Overlay
Speed
increased
(Squat)
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No Overlay
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Squat – Dead Slow Ahead
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Squat – Slow Ahead
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Squat – Half Ahead
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Squat – Full Ahead
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Squat – Full Sea Speed
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Dynamic Tidal Changes – Chart Overlays
SOMS UKC Concept Study
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Chart Overlays – In Operation
SOMS UKC Concept Study
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MV SA Altius
Cape size Bulk Carrier 171,000DWT
Engine Failure
&
Prevented Grounding
Port Hedland Shipping Channel
2nd February 2014
Contingency Planning
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Use of DUKC Series 5 allowed
on site interrogation of speeds
required to reach:
a) Emergency Anchorages
b) C1 and end of channel
This gave the onboard Pilots
an immediate plan.
The same transit information
was available via the Pilot’s
Portable Pilot Unit.
With the speed achieved by
towing, the vessel could be
towed to the Emergency
Anchorage at C7.
DUKC® assistance
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Overlay automatically updated PPU
The extreme tide
contributed to
difficulties in
control of the
vessel, however
also ensured that
with use of
technology there
was water
available for a
safe, slow speed,
channel transit.
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Information
Exchange
Shared Picture
Overlays and E-Navigation
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DUKC® Overlays and e-Navigation
• Shared picture/Information Exchange (Shore and Ship)
• Enhanced navigation and informed decision making
• Readily understandable – Go/No Go overlays
• Ensured safety effective mitigation of grounding hazards
• Maximises productivity and efficiency and
• Increased economic benefits
• Effective contingency planningIALA 2014 AISM
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Looking Forward
• Chart Overlays – S100 product specification and S100 conforming overlays
– ECDIS integration
• Communications– Vessel specific DUKC data (NMEA statements)
– VDES
– AIS Addressed Specific Messaging/ AIS Automation
• Data– Engagement with Hydrographic Offices TSMAD / TWLWG / DQWG
– Dynamic tides/ ENC gridded data sets
– Customised data sets
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Final Note
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Thank You
SOMS UKC Concept Study