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Navionics

Discussion in 'Cruising Sailors' started by Sturtzebecker, Oct 9, 2017. Add this thread to a FAQ

  1. Sturtzebecker

    Sturtzebecker

    Joined Sep 11, 2017
    2 posts, 0 likes
    Hunter 270
    US Davis, CA Berkeley
    I'm new to this, so please bear with me. I just got a Raymarine Axiom 7 chartplotter with a Navionics chart. The chart shows detphs in feet but each depth is indicated with two different numbers, one of them in smaller font. Can anybody explain? The chart looks quite cluttered like this. I'll appreciate your comments.
    Cheers, Albert
     


  2. Love and Luck

    Love and Luck

    Joined Sep 25, 2016
    65 posts, 26 likes
    Oday 22
    US Halfway between Erie and Pittsburgh Lake Arthur
    can you post a picture of that?
     


  3. Charlie Jones s/v Tehani

    Charlie Jones s/v Tehani

    Joined Mar 1, 2012
    1,221 posts, 205 likes
    1961 Rhodes Meridian 25
    us Texas coast
    feet vs meters- most of the world uses meters

    as an aside I prefer Inavix- Navionics showed me on the wrong island in the Bahamas to many times
     


    Love and Luck likes this.
  4. LeslieTroyer

    LeslieTroyer

    Joined May 20, 2016
    956 posts, 199 likes
    Catalina 36 MK1
    US Sammamish, WA Everett, WA
    Feet and inches??
     


  5. Chris Gordon

    Chris Gordon

    Joined Feb 28, 2013
    39 posts, 25 likes
    Pacific Seacraft 40
    US Belfast
    Ditto what Charlie said about the Bahamas. Cmap also has good Bahamas charts.
     


  6. DayDreamer41

    DayDreamer41

    Joined Oct 29, 2016
    556 posts, 177 likes
    Hunter 41 DS
    Un Michigan Port Huron
    From the Navionic's site
    Meters or Feet:
    Larger (regular font) number = full depth unit (Meters or Feet)
    Smaller (subscripted) number = 1/10 depth unit
    Where your depth unit is set up on the chart plotter or Mobile App as feet or meters.

    As for congestion on your chart, you may be able to set the amount of detail the chart displays, on my Raymarine it is under "Preferences" I believe. If you zoom in to a tighter view the congestion will disappear as well.
     


  7. Scott B

    Scott B Moderator

    Joined Sep 20, 2006
    2,451 posts, 76 likes
    Hunter 33
    CA Georgian Bay, Ontario, Canada
  8. Jackdaw

    Jackdaw

    Joined Nov 8, 2010
    7,523 posts, 1,348 likes
    Beneteau First 36.7 & 260
    US Minneapolis MN & Bayfield WI
    It’s what daydreamer points out. I find this happens a lot in areas where the original soundings were done in a unit other than the one being used on the chart. Like California. Personally, I think this is fine for meters but I’d be OK with rounding in feet.

    793F4B9C-A9AC-4CE7-A8BD-A1811B3531E9.jpeg
     


  9. Sturtzebecker

    Sturtzebecker

    Joined Sep 11, 2017
    2 posts, 0 likes
    Hunter 270
    US Davis, CA Berkeley
    Thank you very much for the useful responses!

    Cheers, Albert
     


  10. jssailem

    jssailem

    Joined Oct 22, 2014
    3,512 posts, 735 likes
    CAL 35 Cruiser
    US Salem, Moored Port Everett WA
    Not to add confusion to this but, when I bring up my iNavX chart of the same Berkeley bay location using the NOAA chart 18652_5 I see the same numbers. The NOAA charts are in feet not meters.
     


  11. DayDreamer41

    DayDreamer41

    Joined Oct 29, 2016
    556 posts, 177 likes
    Hunter 41 DS
    Un Michigan Port Huron
    Some NOAA charts state bottom right hand in the border, "Soundings in Feet" just wondering. There are also NOAA charts marked soundings in Fathoms, I guess it depends what chart is ordered.
     


    Last edited: Oct 10, 2017
  12. Love and Luck

    Love and Luck

    Joined Sep 25, 2016
    65 posts, 26 likes
    Oday 22
    US Halfway between Erie and Pittsburgh Lake Arthur
    upload_2017-10-10_14-43-10.png
    upload_2017-10-10_14-43-54.png
    upload_2017-10-10_14-44-53.png

    for what it's worth
     


  13. Love and Luck

    Love and Luck

    Joined Sep 25, 2016
    65 posts, 26 likes
    Oday 22
    US Halfway between Erie and Pittsburgh Lake Arthur
    meters, for kicks and giggles:
    upload_2017-10-10_14-54-11.png
     


  14. sesmith

    sesmith

    Joined Jul 1, 2010
    511 posts, 54 likes
    Seaward 25
    US Ithaca, NY
    Check your settings in the Navionics app. It will display in either feet, meters, or fathoms, depending on how it is configured. (Under menu/settings/units). Small # is 10ths.

    edit: that's where you find the display settings in the Navionics app. Assuming your chartplotter has a similar setting configuration.
     


  15. jssailem

    jssailem

    Joined Oct 22, 2014
    3,512 posts, 735 likes
    CAL 35 Cruiser
    US Salem, Moored Port Everett WA
    Love n Luck./... Yes. Feet sometimes Fathoms.. It changes based on the chart. As the charts focus on smaller areas like bays and harbors Feet is generally used as the water is often shallow.
     


  16. Larry -- DH

    Larry -- DH

    Joined Jun 14, 2010
    177 posts, 59 likes
    Quorning Dragonfly 1200
    US home
    Paper yes. Not with Vector charts - it's a program setting.
     


  17. Jackdaw

    Jackdaw

    Joined Nov 8, 2010
    7,523 posts, 1,348 likes
    Beneteau First 36.7 & 260
    US Minneapolis MN & Bayfield WI
    iNaxX uses RNC (raster) charts that will only display soundings in the original unit of chart measurement. ENC charts allow for the sounding units displayed to be changed under programmatic control.
     


  18. jssailem

    jssailem

    Joined Oct 22, 2014
    3,512 posts, 735 likes
    CAL 35 Cruiser
    US Salem, Moored Port Everett WA
    Thanks Jackdaw.
     



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