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Ted Lavino
Moderator
Username: tlavino

Post Number: 231
Registered: 01-2006
Posted on Wednesday, March 04, 2020 - 06:09 pm:   Edit Post Print Post

The folks at Rose Point Navigation are coming out with an IOS version of Coastal Explorer to compete with iNavX. The beta will begin soon:


Coastal Explorer on the iPad and iPhone:

You've been asking for years, and now it's here! Rose Point Navigation Systems is excited to announce the beta of Coastal Explorer on the iOS platforms. The Coastal Explorer you trust is now fully mobile, and in the palm of your hand.

To install our beta, please visit our forum at community.rosepoint.com. There you will find instructions on how to download the beta, and find answers to your questions. All Support for the beta will be handled on this forum.

We're planning on a release in time for cruising season, so feedback from our users is critical. Download the beta and join the forum today. We're looking forward to your feedback!
 

Ted Lavino
Moderator
Username: tlavino

Post Number: 227
Registered: 01-2006
Posted on Sunday, February 11, 2018 - 07:25 pm:   Edit Post Print Post

Folks, David Burch from StarPath Navigation has set up a nifty electronic simulation service allowing you to practice using your electronic navigation software of choice (as long as it supports receiving NMEA sentences via TCP/IP). This is a great way to become familiar with how your application works in various scenarios, ex. AIS indications of an imminent collision, etc.

A great video by David at:
https://www.youtube.com/watch?v=zOeUVAdeYDU&list=PLx1XvLdpAhGBhysVDlmvsF2MHO0olI g9I
 

Ted Lavino
Moderator
Username: tlavino

Post Number: 141
Registered: 01-2006
Posted on Sunday, June 20, 2010 - 12:45 pm:   Edit Post Print Post

For those interested, more info regarding the significance of horizontal data can be found at:

http://www.nga.mil/MSISiteContent/StaticFiles/Files/NautChrts_GPS_index.htm
 

Ted Lavino
Moderator
Username: tlavino

Post Number: 139
Registered: 01-2006
Posted on Sunday, June 20, 2010 - 10:27 am:   Edit Post Print Post

In other chart plotter programs one is able to specify which horizontal datum the GPS is configured to use (and therefore what horizontal datum the coordinates it is sending is based on). This allows the chart plotter software to make any needed corrections if the chart being used to display the position is using a different horizontal datum.

For example, the GlobalSat BU-353 I've recommended in past posts outputs data using the WGS84 datum only (you cannot change it as you can with the Garmin GPS76 for example). However, most of the current NOS raster charts are prepared using the NAD83 datum.

Unfortunately Coastal Explorer does not allow you to specify which horizontal datum the GPS is using. It is hard coded to use WGS84 and will perform any corrections necessary if the chart was not created using the WGS84 datum. Good news for BU-353 users, but if your GPS is not set to use WGS84 your position on the chart will be inaccurate.

There is a NMEA 0183 sentence that the GPS uses to tell the chart plotter which datum the GPS is using, and Coastal Explorer will present an alarm if its not WGS84, at which point you can reconfigure the GPS if the GPS supports that feature.

From Brad, the CE developer in Coastal Explorer's forum:
You should always leave your GPS set to WGS84 when using Coastal Explorer. Vector charts always use WGS84. If you are using raster charts that are not WGS84, then Coastal Explorer will transform them to WGS84 when it displays them (in fact, it couldn't create a proper chart quilt unless all of the charts used the same datum).

Coastal Explorer will sound the alarm for one of two reasons. One is when it receives the standard NMEA 0183 DTM sentence with a datum code other than W84. The other is when it receives a Garmin Propritary PGRMM sentence with a datum of other than "WGS 84". This might be the wrong thing to do... The documentation we have for the PGRMM sentence is pretty vague, but it looks like the sentence might have to do with the datum of the map currently displayed on the Garmin, and not the datum being used by the GPS. Unfortunately, we do not have any way of testing this right now as alll of the Garmin maps we have are WGS 84...

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