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Right now we don’t we a simple ruler tool in the app. But what you can do is drop a waypoint by touching the Flag button and select either “Drop a Waypoint” or “Drop a Waypoint near Me”.  Then when done, select “Save & Guide” and when you do, the bottom panel will display the heading and distance.You can also, select “Create Route” and then lightly press your finger on the screen to create your waypoints and the distance between the two will show up on the bottom panel.


We get asked this question quite a bit and its a tough question to answer by “area” because the size of the area you can download at any one time is determined by the zoom level of the charts. The more detail, the more information, the more storage it takes, therefore the less area you can manageably download and any given time.

Bottom line though, is you can now download an immense amount of chart data at one time (100,000 tiles) and you can download as many areas as you like.

Our recommendation is to download a large, medium level zoom of the entire region of the area you’re boating, and then download as many high-detail regions (typically close to shore, or inlets) as you need / like. You can mix and match as much you like as again, there are not any limitations to how often or how many regions you download (save the storage space on your iPad) – just how much you can download at any one time.
One other idea is to create a Route, and then going back to that Route (once its saved) and select “Download Maps for the Track”. Yes, we know, the language doesn’t make too much sense, but what this does is download all of the charts for your specific route at a fairly close zoom level. This is super easy to do once you get the initial hang of it.
We hope this helps…


Our latest upgrade to our iPhone / iPad app, while fixing the previous bug with a small cluster of users, created potential issues for some users who are using Apple’s iOS version 4.x or earlier. We’re busy working on this fix and should have this out by the end of this week. Alternatively, you can upgrade your iphone / ipad to Apple’s latest iOS version 5.1 (which we would recommend in any event). Sorry about this latest bug…

The EarthNC Team.

We’ve discovered an issue with showing current speed in US Marine Charts 2.0 on iPhone/iPad. We will be posting an updated version ASAP which will download through the normal Apple update process.

Yes. In both the Android and iPhone apps, you can select a region to download so that if you’re boating beyond cell coverage, you can have the charts with you. Attached are some screenshots below that show the process. Note: right now, there is a limit to the amount of chart data you can download for each download (10,000 chart tiles, or 20MB roughly for you techies) but you can download different regions as often as you like. We will be upping the download data limits in the coming months.

– EarthNC

Google Earth 5 requires a minor patch for those still using EarthNC Plus prior to version 2.10

You can verify your EarthNC Plus version by opening your EarthNC Plus Users Manual.

The patch is automatically applied with the v2.10 chart updates, but if you’d rather just update the affected file without updating charts, you can download the following fixes.  After downloading, extract the files into your C:/Program Files/EarthNC/EarthNC Plus/charts folder or /Applications/EarthNC Plus/charts folder and replace the existing files.

Version 2.0 – 2.9 Patch for Win/Mac

Version 1.0 – 1.9 Patch for Win/Mac (if you’re still using version 1, we really recommend an upgrade to the latest EarthNC Plus versions)

clampedToSeaFloor_3.jpgThe oceans have come alive in brilliant 3D with the new Google Ocean layers in Google Earth 5.  While Google has included some great starter content in their Ocean layers, EarthNC has a huge library of free nautical content to add to the ‘Ocean’ experience including charting, fishing and dive sites, weather, photos, videos, and more.

Here are just a few EarthNC layers you might want to try –

EarthNC Online Charts – View navaids, channels, lights, and more with EarthNC Online.  Use the Weather and Tide links to find current conditions at thousands of locations.  Explore thousands of wrecks and dive site locations with our Fish and Dive Site layers.  To learn more, visit the EarthNC Online homepage or try it now in Google Earth.

seasprayresort.jpgCoastal Photos from – View thousands of coastal locations with our Aerial Photo map.  Photos are in brilliant high-resolution and where taken from low altitude for the best possible views of marinas, inlets, bridges, and more.  Combined with EarthNC chart information and the Google Earth satellite images – it’s as close to ‘being there’ as you can get from your computer.  Each location includes links to more information. Try it now in Google Earth.  Areas include North American coastline, rivers, and the Great Lakes, the Caribbean, and Europe.

Worldwide YouTube Boating Videos – Watch people boat, fish, and sail with our worldwide boating video map.  Just zoom into any area and if people have uploaded boating videos they’ll show as thumbnails.  Click on a thumbnail and you can play the video right in Google Earth.  Try in now in Google Earth.

View a 3D Chart – Try out a 3D chart in Google Earth.  Zoom in below the water and you can see the chart mapped directly onto the ocean bottom.  We hope Google provides an option to turn off the surface wave layer in the future so that you can see charts in 3D from more Zoom levels.  

Beyond the Basics – Ready for more than just simple ocean browsing?  EarthNC provides full chart products and GPS integration with EarthNC Plus – you can even use them offline!  Try our full charts online free for 30 days with an EarthNC Lite Trial.  Plan a trip, collect waypoints, and more with Google Earth and then send them to handheld GPS devices with our Trip and Route Tool.  

The story behind the cool robot gliders...

The story behind the cool robot gliders...

Solar powered gliders developed by Liquid Robotics play a crucial role in helping track and monitor Great White movements. Learn more about this important new technology by clicking here.
Shark Net app featured on Shark Week
Watch Discovery Channel's Shark Week on Thursday evening (August 16th) at 9:00 p.m. (EST) to learn more about the amazing work by TOPP researchers to help preserve Great Whites and the app that supports them.
TOPP, the story behind Shark Research
The Shark Net app showcases years of research by the Stanford University's Hopkins Marine Station and the TOPP Institute. Learn more about this hugely important project and the team of researchers behind them by clicking here.