NOAA Teacher at Sea
Onboard NOAA Ship Pisces
November 7 – 19, 2009
Mission: Ecosystem Survey
Geographic Region: Southeast U.S.
Date: November 14, 2009
Of the many things I have learned so far there are three things that are standing out in my mind right now that I can share…..1) there is so much ionization in the ocean (salinity) that if it’s not neutralized it can cause many rusting/electrical problems on the ship 2) water on the ship is purified by passing through a UV light before it is sent for drinking and using on the ship 3) plank owners are called the very first crew members on a new ship!
When I went on the tour of the engine room or should I say rooms. The engineer pointed to a sign that read “cathode”. Well, I know my physical science students remember that a cathode is an electrode where an electric current flows out of a polarized electrical device. Anyway, the ship has all this salt water flowing in (lots of NACL) that has an electric charge so it has to be neutralized using the cathode so the water doesn’t cause any high electrical charges that can be dangerous with so much high voltage already running on the ship. Cool, huh?
Then the engineer explained the process of making water. The ship goes through about 1800 gallons of water per day. Through the process of purifying the water at the final stage is a tiny box with a long rectangular tin attached to a long thick wire. Above this box water flows through another tube flowing across the rectangular box. It reads ‘CAUTION: UV radition light’. As the water flows across the UV light it is emitting short wavelengths of ionizing radiation to rid of any living microorganisms in the water making it suitable to drink.
Finally, another crew member discussed the aspect of the ‘plank owners’. This is an individual who was a member of the crew of a ship when that ship was placed in commission. So since PISCES was commission on November 6, 2009 and the entire crew that is with me now on the ship was a member of the crew then they are all the plank owners of PISCES and I am the office plank owner Teacher at Sea!