How do you study something you can not touch, see, hear, feel or
smell? Instruments -- from simple to high-tech -- do the work. The most
important instrument an oceanographer can take to the Southern Ocean is
a ship. This is the platform from which all other work is done. A good research
ship needs to have several attributes:
The R/V Polar Duke is a 219-foot ice strengthened research
vessel chartered by Antarctic Support Associates on behalf of the National
Science Foundation. In July 1997, the ship will complete its 10 year charter.
This is an appropriate time to examine tools and riggings which have effectively
gathered Antarctic data for the past decade.
To gather the needed data, the R/V Polar Duke deploys over-the-side
equipment for trawling and acoustical studies, SCUBA diving, marine collecting
and photographic activity. Some instruments are lowered into the ocean on
long cables. Instruments have to be strong to withstand the pressures of
the sea yet they must be very sensitive. Instruments often have clever methods
of grabbing a sample of what is being studied at a specified depth so it
can be brought up to the deck of the ship. Sea-Bird electronics measure
temperature, conductivity and depth electronically at about 6,000 meters.
The ship also carries and deploys one snowmobile, one Suzuki all-terrain
vehicle, and two Zodiacs.
The R/V Polar Duke provides valuable laboratory space and equipment for the scientific community that lives aboard the ship. This lab equipment includes:
The science groups, with their complements of students, staff, and volunteers,
operate all of the laboratory equipment and most of the deck equipment.
The ship's crew operate the winches. The Lab Supervisor is ultimately responsible
for hazardous waste, and will assist in setting up equipments, etc.
To use this equipment, it is necessary that the seawater be free of ice
particles which could clog the machinery, and free of trace metals which
would contaminate the seawater and give false readings about the dissolved
minerals in seawater. Seawater sampling is drawn from the moon pool through
epoxy coated steel piping and ice strainers made of nylon and epoxy. Water
then flows through PVC pipes. The seawater is free of ice clogs. Temperature
and salinity are measured.
The R/V Polar Duke also has eight 24 cu ft aquaria filled with
uncontaminated seawater from a seawater intake. Deck incubators with Plexiglas
or UV Transparent Plexiglas are available for scientists to use.
Blackline Master #11