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  2. Hydrographic survey - Wikipedia

    en.wikipedia.org/wiki/Hydrographic_survey

    The term hydrography is used synonymously to describe maritime cartography, which in the final stages of the hydrographic process uses the raw data collected through hydrographic survey into information usable by the end user. Hydrography is collected under rules which vary

  3. Bathymetric chart - Wikipedia

    en.wikipedia.org/wiki/Bathymetric_chart

    Bathymetric surveys are a subset of the science of hydrography. They differ slightly from the surveys required to create the product of hydrography in its more limited application and as conducted by the national and international agencies tasked with producing charts and publications for safe navigation. That chart product is more accurately ...

  4. Multibeam echosounder - Wikipedia

    en.wikipedia.org/wiki/Multibeam_echosounder

    A multibeam echosounder is a device typically used by hydrographic surveyors to determine the depth of water and the nature of the seabed. Most modern systems work by transmitting a broad acoustic fan shaped pulse from a specially designed transducer across the full swathe acrosstrack with a narrow alongtrack then forming multiple receive beams (beamforming) that are much narrower in the ...

  5. Echo sounding - Wikipedia

    en.wikipedia.org/wiki/Echo_sounding

    In areas where detailed bathymetry is required, a precise echo sounder may be used for the work of hydrography. There are many considerations when evaluating such a system, not limited to the vertical accuracy, resolution, acoustic beamwidth of the transmit/receive beam and the acoustic frequency of the transducer.

  6. Inside the Crimes of the 'Giggling Granny,' Serial Killer of ...

    www.aol.com/inside-crimes-giggling-granny-serial...

    Nannie Doss confessed to killing four of her husbands, her mother, sister, two of her children, two of her grandsons, and a mother-in-law over a 27-year killing spree

  7. Cats keep catching and spreading a puzzling and deadly ... - AOL

    www.aol.com/cats-keep-catching-spreading...

    Following guidance from the CDC, you should monitor yourself and your family for any flu-like symptoms and contact a healthcare provider if concerns arise. Wash your hands after handling your cat ...

  8. Hydrography - Wikipedia

    en.wikipedia.org/wiki/Hydrography

    Hydrography is the branch of applied sciences which deals with the measurement and description of the physical features of oceans, seas, coastal areas, lakes and rivers, as well as with the prediction of their change over time, for the primary purpose of safety of navigation and in support of all other marine activities, including economic ...

  9. Icy East Coast is getting a break − but it will be warm, wet ...

    www.aol.com/icy-east-coast-getting-break...

    Much of the East Coast was in for a polar reprieve. But that warm-up comes with a price: foggy, wet weather, and in some cases a full-blown soaker.