Northwest Dive Club

Hi All,
Sharing this site i use to look at depths and underwater terrain before diving. It has very detailed information local and across the world. Great to reference when looking at new sites! Link below.

http://fishing-app.gpsnauticalcharts.co ... 1/-124.074

Nice. It seems like the depths are from mean low tide (e.g. it shows Edmonds UW park as a max of 30 ft), but you can set an option to add an offset (+10 so 40ft)

Very interesting! I enjoyed looking at this!

If you havent already- I'd check out the mobile Navionics Boating app.

Although there isn't full coverage across all the Puget Sound there is super high resolution bathymetry available thanks to the NOAA Hydrographic Survey: https://maps.ngdc.noaa.gov/viewers/bathymetry/

Selecting "BAG Color Shaded Relief" will show you the high resolution NOAA Hydrographic Survey stuff. Attached is an example near long island. "DEM Color Shaded Relief" will show data with much wider coverage but it unfortunately is much lower resolution. The color legends are viewable when you hover over the question mark icons. Unfortunately the scales are logarithmic but if you need a more specific depth estimate I've had success using a color picker tool in a graphics editors to measure the hue at a specific point and by comparing to a hue based color legend I made in excel. If others have an easier way I'd love to hear how you go about it.

Also... for fun turn off the DEM stuff and instead select "Multibeam Bathymetry Mosaic" which has data collected from various research vessels worldwide and zoom out to see just how little of the world's oceans have been explored. https://maps.ngdc.noaa.gov/viewers/iho_dcdb/ also has similar (or the same?) data available.

Cmjstealth wrote: ↑Wed Sep 23, 2020 4:09 pm super high resolution bathymetry available thanks to the NOAA Hydrographic Survey: https://maps.ngdc.noaa.gov/viewers/bathymetry/

Cool, now I can guesstimate where it was that I clung to a rock/ramp for ten minutes, about 30 minutes into a "late slack" (aka too early start) :crabmode: