Bjørn Helland-Hansen
In 1910, he developed the " Helland -Hansen photometer ", which was used on board the " Michael Sars ". It was first used in the vicinity of the Azores at a depth between 500 and 700 meters.
Pictures of Bjørn Helland-Hansen
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Bjørn Helland-HansenIn 1910, he developed the " Helland -Hansen photometer ", which was used on board the " Michael Sars ". It was first used in the vicinity of the Azores at a depth between 500 and 700 meters. Pictures of Bjørn Helland-Hansen
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