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Marine Instruments

Marine Instruments. Marine Instruments. Measuring and collecting tools. gravity core. The most basic sampling device used to collect core samples from the seafloor, it penetrates less than 10 meters into the sediment. Nansen bottles.

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Marine Instruments

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  1. Marine Instruments Marine Instruments

  2. Measuring and collecting tools

  3. gravity core The most basic sampling device used to collect core samples from the seafloor, it penetrates less than 10 meters into the sediment

  4. Nansen bottles Sub-surface measurements of water samples are made with water sampling bottles. There it is closed by tripping action. When the bottles have been brought back on deck, the water samples are analyzed.

  5. Niskin Bottle, Van Dorn Bottle Used to collect water samples from discrete depths, which are then chemically analyzed. Phosphates, nitrates, and silicates Dissolved Oxygen

  6. Shipek Grab Samples a wide variety of ocean and fresh water sediment. The sampler is designed to take samples in soft ooze, clay, sand, gravel and pebbles on flat or gently sloping bottoms.

  7. Grab Sampler This instrument is used to remove a piece of the ocean floor for study

  8. Hydrometer A device used to measure the densities of liquids and solutions.

  9. Secchi Disk Used to estimate the transparency of seawater, and can provide a relative measure of productivity or turbidity.

  10. Drift bottles The use of drift bottles as a means of charting ocean currents is an old one, and their use in research is not without precedent.

  11. CurrentMeter An instrument for measuring the velocity, force, etc., of currents.

  12. Temperature and depth recorder With this attached to the collecting net, the depth and temperature can be calculated to determine exactly where and at what temperature the fish were collected in the water column.

  13. Salinonometer A hydrometer that determines the concentration of salt solutions by measuring their density

  14. Refractometer An instrument used to measure the salt concentration of seawater by using the refraction of light.

  15. Hydrophone A microphone for acoustic measurements in fluids. Hydrophone

  16. SCUBA Self Contained Underwater Breathing Apparatus

  17. Echo Sounding The use of a timed sound wave to determine the depth of the water

  18. Global Positioning System (GPS) A worldwide radio-navigation system that utilizes satellites to triangulate a specific location on earth.

  19. Nets and Sieves

  20. Dip Net Useful for scooping up seaweed, jellyfish, and other drifting organisms from docks and the side of the vessel.

  21. Sediment Sieves Used to analyze sediment grain size composition.

  22. Plankton Net A cone shaped net of fine mesh material with a collecting jar at the base.

  23. Phytoplankton nets This fine mesh net collects the smallest plant plankton, which is then easily analyzed under the compound scope for diversity and species composition.

  24. Neuston Net This new large mesh surface water net enables us to tow for the larger zooplankton (animal plankton), which are readily visible under the dissecting scope.

  25. Dredge This device is dragged across the ocean floor to obtain biological or geological samples. It can take many shapes either cylindrical or boxlike.

  26. Trawl Net The mouth of the net is kept open through "otter boards" attached to the leading ends of the net, or, by current passing through the net.

  27. Crab Pots Crab Pots are used for collecting crabs for study and food

  28. ROVs

  29. ROVS Remotely operated underwater vehicles (ROVs) are unoccupied, highly maneuverable underwater robots operated by a person aboard a surface vessel.

  30. James Cameron – “Green Machine”

  31. One Sheet of Notebook Paper per group • Each Station has its own mission. • NEATLY spread out instruments found in the envelope. Decide which instruments will need to be used to successfully complete the mission • List all instruments needed on paper. • The instruments needed range from 5-12 • Leave the instruments NEATLY laid out and wait for instructions to switch

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