Simrad EK60 Scientific echo sounder

Simrad EK60

Trial by fire for R/V Ramón Margalef

The new multi-purpose research vessel R/V Ramón Margalef, which belongs to the Spanish Oceanographic Institute (IEO), was undergoing sea trials when the Science Ministry decided to move it to the Canary Islands to follow up on the activity of the volcano on El Hierro Island. The vessel was only delivered a few weeks previously, on 23 of September 2011, so with such a challenging first mission, this really was a trial by fire.

During the first week of the mission, the goal was to map the volcano so researchers had a clear view of its footprint. It didn't take long for the team to build a good picture of the volcano using the data acquired with the Kongsberg EM 710 multibeam echo sounder system installed on board R/V Ramón Margalef.

R/V Ramón Margalef

R/V Ramón Margalef

After the volcano was located, the EM 710 was used to measure dimensions such as cone height from the bottom and diameter. The IEO team compared this data with a dataset from the same area acquired on board R/V Hespérides using the Kongsberg EM 12 in 1998, in order to calculate how much the volcano had risen.

The team then went on to research the gasses and water column using the six different frequencies of the Simrad EK60 scientific echo sounder and Simrad ME70 multibeam echo sounder. Once the area was fully mapped the ROV operations started, which enabled the team to view high quality video of the sea bottom around the volcano captured by high definition cameras supplied by Kongsberg Maritime in Aberdeen.

The vessel will normally perform different oceanography missions launching various sensors, with vessel navigation supported by Kongsberg Maritime's K-Pos Dynamic Positioning and K-Bridge Integrated Bridge System.

So not only was this first mission a trial by fire for R/V Ramón Margalef, but the Kongsberg Maritime Full Picture delivery onboard has been put through its paces too. The systems performed reliably and accurately from the offset, enabling the team to acquire the data they needed to make the first mission for R/V Ramón Margalef a great success.

Kongsberg EM 710 El Hierro 2011

This screen capture shows the location of the volcano. It is taken from the Kongsberg EM 170 hydrographic multibeam echo sounder. Image courtesy of R/V Ramón Margalef.

Simrad EK60 El Hierro 2011

These echogram screen captures shows the gases emitted by the volcano. It is taken from the Simrad EK60 scientific echo sounder using different frequencies. Image courtesy of R/V Ramón Margalef.

Kongsberg EM 12 El Hierro 1998

The seabed outside the El Hierro island in 1998 mapped with the Kongsberg EM 12 system on R/V Hesperides. Image courtesy of R/V Ramón Margalef.

Kongsberg EM 710 El Hierro 2011

The same seabed location outside the El Hierro island in 2011 mapped with the Kongsberg EM 710 system. The new volcano with crater and lava flow can easily be identified. Image courtesy of R/V Ramón Margalef.

 
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