Navionics

Love and Luck · Oct 9, 2017

Sturtzebecker said:
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

can you post a picture of that?

Charlie Jones s/v Tehani · Oct 9, 2017

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

LeslieTroyer · Oct 10, 2017

Feet and inches??

Chris Gordon · Oct 10, 2017

Ditto what Charlie said about the Bahamas. Cmap also has good Bahamas charts.

DayDreamer41 · Oct 10, 2017

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.

Scott B · Oct 10, 2017

Do you have a copy of the manual?

http://www.raymarine.com/multifunction-displays/axiom/axiom7/

Jackdaw · Oct 10, 2017

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.

jssailem · Oct 10, 2017

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.

DayDreamer41 · Oct 10, 2017

jssailem said:
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.

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.

Love and Luck · Oct 10, 2017

DayDreamer41 said:
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.

for what it's worth

Love and Luck · Oct 10, 2017

meters, for kicks and giggles:

sesmith · Oct 10, 2017

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.

jssailem · Oct 10, 2017

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.

Captain Larry-DH · Oct 11, 2017

jssailem said:
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.

Paper yes. Not with Vector charts - it's a program setting.

Jackdaw · Oct 12, 2017

jssailem said:
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.

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.

jssailem · Oct 12, 2017

Thanks Jackdaw.