concerted surveying for the sake of navigation · substantial progress made in systematic...
TRANSCRIPT
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http://www.famosproject.eu/http://www.stmvalidation.eu/
Concerted surveying for the sake of navigation
Benjamin Hell – Swedish Maritime AdministrationGunter Liebsch – German Federal Agency for Cartography and Geodesy
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Good news:The Baltic Sea is 100% mapped
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New shoal: 8.7 m (in 1970s surveying 13.2 m)
4.5
m
12.2 m
1 km
Ship tracks: One week summer 2014PassengerCargoTanker
Safety of navigation
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”Situational awareness”
• Where am I?
• How much water do I have underneath?
• What happens out there?
• How does that effect me?
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Autonomous vesselsYes, they will come.
Image: © Rolls Royce
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Optimising where vessels go can save a lot of fuel
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Fuel efficient vessel routing
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https://helcomresurvey.sjofartsverket.se/
BSHC-HELCOMre-survey planFAMOS is about Cat I and II (main shipping areas)
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Helsinki Commission
– Baltic Sea environmental ministers, Oct 2013
substantial progress made in systematic re-surveying of major shipping routes
take actions to ensure the completion of the re-surveys for areas used bynavigation (CAT I and II) within the time schedules estimated
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Before FAMOS: About 50% surveyed to modern standards
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After FAMOS:100 000 km² more(area of Portugal)Timeframe: 2014-2020
Costs: approx. 80 MEUR
Co-financing:Over 20 MEUR 2014-2018from EU transport infrastructure funds
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One month’s voyages to Gothenburg• Yellow lines: direct approach• Red lines: Vessel anchor prior to berthing, on
average 6 hours• 17,7 % av approaches anchor! Plus Skaw…• Going slower and arriving just in time would
save them 34% fuel• That’s 4,1% for all voyages to Gothenburg!
Common situational awareness can lead to enormous savings
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www.stmvalidation.eu
https://www.youtube.com/watch?v=03QLivaG_jE
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FAMOS activity 2:A new geodetic chart datum for the Baltic Sea
Gunter Liebsch (BKG), Jonas Ågren (Lantmäteriet),
Wilfried Ellmer (BSH), et.al.
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POSITIONING
What value is z, far outat sea?
How does it relate tocharted depths and
UKC?
What do we mean withMean Sea Level and where is it exactly?
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Problems
• Complexity: We use a multitude of different MSL in the Baltic Sea.
→ harmonize and use one chart datum only
• Compatibility: Reference level in nautical charts lacks strong coupling to GNSS coordinates
→ use a geodetic reference
• Accuracy: How good are GNSS heights at sea?
→ study and improve if needed
• Vessel dynamics: Where is the vessel hull in relation to the water surface?
→ measure vessel position and orientation absolutely instead
• Hydrodynamics: Where is the water surface in relation to the chart reference?
→ use the water surface only for planning, not for navigating
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(x, y)
z
UKC?
2D
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(x, y, z)
(x, y, z)
UKC!
“Under Keel Clearance aware navigation”
3D
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(vertically, at sea)
As soon as we get this, the current maritime 1.1% share of the GNSS market will skyrocket
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+ 10 cm draft + 20 kUSD profit(per port call)
assuming typical Aframax tanker, 3 USD profit per barrel
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A more suitable chart datum: The idealized MSL, called geoid
Advantages:
Can be measured rather precisely at the open sea
Has a practical relevance as it coincides well enough with MSL
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Measure 10−6gon a moving platform.
Pretty cool.
From gravity data, the geoid can be modelled.
Ambition: Uncertainty < 5 cm
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A lot will fall in place within the coming years:
• Full coverage bathymetry (S-102 in ECDIS!)
• Accurate GNSS heights at sea (Galileo CS!)
• Sea Traffic Management
• The digitalization of the entire maritime logistics chain
Hydrography is right in the middle of it!
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http://www.famosproject.eu/http://www.stmvalidation.eu/