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Old 18 February 2014, 02:54   #1
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Teamsurv - crowd bathymetry


BBC News - Crowdsourced boats to map the seas

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Old 18 February 2014, 04:19   #2
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Makes sense.

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Old 18 February 2014, 05:14   #3
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Yes agree makes sense. Wonder how they'll go about it. Willingly play my part if that's what they ,voleenteers !!

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Old 18 February 2014, 05:32   #4
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Old 18 February 2014, 14:05   #5
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We do quite a bit of Bathy, but the RIB as a platform only really works where others struggle to access.... Even then, it requires a lot of kit (single and multi -beam applications) and needs to be done at relatively low speeds and with an MRU working to compensate for pitch and heave..... I don't believe RIBs would be what these guys are looking for.... But stand to be corrected
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Old 18 February 2014, 15:44   #6
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Just seen this via a link from Northern Exposure Rescue...

I thought that Raymarine already do this?

BBC News - Crowdsourced boats to map the seas
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Old 22 February 2014, 06:30   #7
Country: UK - England
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Boat name: Skinnie
Length: 4m +
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RIBs are fine - we don't aim to provide as good quality data as a professional survey, but as you can see on this chart The State of Hydrographic Surveying (from UKHO data) there is a lot of our waters that need better surveying.

Because a normal depth sounder has a much wider beam angle than a depth sounder intended for a professional survey, and is just single beam, we don't need an MRU - the wider beam angle eliminates most effects of changes in heel and trim.

The only drawback with high speed is if the depth sounder loses the bottom echo due to aeration of the transducer. We build up data from multiple passes of an area, so the greater distance between pings at higher speed isn't an issue, as in time other passes will fill in the gaps.

All you need to take part is a GPS and a depth sounder, with NMEA0183 or Seatalk output. We supply a small data logger that is simple to connect up and stores data on a USB memory stick, which you take home at the end of the day and upload the data to our web site.


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