Cruisers Forum
 


Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 18-03-2018, 06:02   #1
Registered User

Join Date: Mar 2018
Location: Gdańsk, Poland
Posts: 30
MOB iTag like LifeTag plugin oCPN idea

Hi everybody!

I have idea for a cheaper equivalent of the LifeTag system (Raymarine) or similar systems this type. Raymarine LifeTag
I would like to be able to use iTag bluetooth 4.0 tags. One marker is about EUR 2 / item - in this case: EUR 2 / person.
https://www.ebay.com/sch/i.html?_fro...kw=itag&_sop=2
How does should it work:
Each crew member wears a iTag marker during the trip. When person (marker) will too far from from the PC with OpenCPN:
1. OpenCPN ("iTag MOB" plugin) enables ALARM
2. "iTag MOB" sets the MOB marker (on the chart) in position ehere the yacht was at the time when contact with a man was lost.
Cons: no GPS - no actual current MOB position
Advantages: cheapness, alarm immediately after losing a man.


Does this make sense in Your opinion? Is it possible?


Unfortunately, I can't write a plugin ... maybe someone can, and would like to do it?

regards - Wbartoszy
Wbartoszy is offline   Reply With Quote
Old 18-03-2018, 07:11   #2
Registered User

Join Date: Aug 2009
Location: oriental
Boat: crowther trimaran 33
Posts: 4,414
Re: MOB iTag like LifeTag plugin oCPN idea

Isn't the tag supposed to transmit gps location over ais?

I don't have lifelines on my boat because I might grab one and it breaks.

What if computer speaker breaks, and no one worries while someone drifts away?
seandepagnier is offline   Reply With Quote
Old 18-03-2018, 07:39   #3
Registered User

Join Date: Mar 2018
Location: Gdańsk, Poland
Posts: 30
Re: MOB iTag like LifeTag plugin oCPN idea

Quote:
Originally Posted by boat_alexandra View Post
Isn't the tag supposed to transmit gps location over ais?
No, this isn't AIS-SART:
http://c470.jerodisys.com/470Lib/lifetags.pdf

Quote:
Originally Posted by boat_alexandra View Post
What if computer speaker breaks, and no one worries while someone drifts away?
Nothing. You have situation equal if you haven't any system. In Raymarine LifeTag (for 1000EUR?), the speaker can also break. :-)
Wbartoszy is offline   Reply With Quote
Old 18-03-2018, 13:49   #4
Registered User

Join Date: Nov 2015
Location: Ireland
Posts: 467
Re: MOB iTag like LifeTag plugin oCPN idea

I prototyped this idea with some iBeacons and a bit of Python code a few months ago. The python code faked up an AIS SART sentence which was fed into OpenCpn. The Bluetooth side of things worked and looked promising but whenever OpenCpn received a SART activation message it started generating lots of MOB waypoints which eventually caused OpenCpn to become unresponsive and ultimately crash.

I raised this but was told it's the intended behaviour, so I stopped with the intention of getting back to it sometime. See http://www.cruisersforum.com/forums/f134/one-ais-sart-message-many-mob-waypoints-196636.html.

Aedan
AedanC is offline   Reply With Quote
Old 05-01-2020, 12:42   #5
Registered User

Join Date: Mar 2018
Location: Gdańsk, Poland
Posts: 30
Re: MOB iTag like LifeTag plugin oCPN idea

Quote:
Originally Posted by AedanC View Post
The python code faked up an AIS SART sentence which was fed into OpenCpn.
Maybe this MOB sentence https://www.nmea.org/Assets/21030814...0amendment.pdf
will be better?
Wbartoszy is offline   Reply With Quote
Old 06-01-2020, 05:12   #6
Registered User

Join Date: Nov 2015
Location: Ireland
Posts: 467
Re: MOB iTag like LifeTag plugin oCPN idea

I was not aware of that sentence, it might be good but it all depends on OpenCpn and Garmin support since I feed to both of them.

As an update, I got it working as proto code and intended to test it on the boat last summer, however other more urgent things took over. I have the boat electronics here at home now so this would be a good winter to move it on a bit.
AedanC is offline   Reply With Quote
Old 06-01-2020, 12:15   #7
Registered User

Join Date: Nov 2015
Location: Ireland
Posts: 467
Re: MOB iTag like LifeTag plugin oCPN idea

By the way the OpenCpn bug referred to above has been fixed now.
AedanC is offline   Reply With Quote
Reply

Tags
mob, plug

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
OCPN 4.8.2 Status bar 0.6 : Preference kills OCPN! Didier B OpenCPN 15 12-02-2018 02:05
Opencpn Dokuwiki Migration -MOB- Help Needed!!! MOB rgleason OpenCPN 87 20-12-2016 10:12
For Sale: McMurdo Guardian MOB System TWO MOB watches and Receiver petedd Classifieds Archive 1 26-09-2015 16:31
Raymarine LifeTag System careka Health, Safety & Related Gear 4 09-04-2011 11:32
For Sale: Raymarine Lifetag Wirless Man Overboard System (MOB) - $475 dworkman Classifieds Archive 1 02-11-2009 12:14

Advertise Here


All times are GMT -7. The time now is 04:31.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.