Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 28-05-2017, 22:34   #1
Registered User
 
phantomracer's Avatar

Join Date: Aug 2010
Location: Boston, MA
Boat: 1968 Ohlson 38 Sloop
Posts: 862
Images: 9
Send a message via Yahoo to phantomracer
Plotter (B&G Vulcan 5) not showing boat/paddlewheel speed

Playing with my plotter (Vulcan 5) and was trying to get the boat speed to be the calibrated boat speed (through the water ) that was set using the B&G displays.

The boat speed shows up as the raw paddlewheel speed (100%), not the calibrated speed (68%) that I calibrated on the B&G displays. However, the adjusted keel depth offset does work.

The plotter will show, say 7.x knots, and the boat speed will show, say, 5.x knots. As much as I like the optimistic raw speed, it is grossly inaccurate. The B&G display allows correction for this. But the plotters don't see this correction (and doesn't appear to have any way to correct for it)

I did shoot a video of what i mean, https://youtu.be/4a_O5UkNcjQ

For fun, I did check my other plotter on board (Lowrance HDS8 gen1) and it shows the same inaccurate speed like the other plotter.

Any idea how to get the plotter to either read the speed compensation that was set on the displays, or set some kind of compensation on the plotter?
__________________

__________________
Paul S
Blog - https://www.facebook.com/ohlson38project
website http://www.mildredrose.com
phantomracer is offline   Reply With Quote
Old 30-05-2017, 12:06   #2
Registered User
 
phantomracer's Avatar

Join Date: Aug 2010
Location: Boston, MA
Boat: 1968 Ohlson 38 Sloop
Posts: 862
Images: 9
Send a message via Yahoo to phantomracer
Re: Plotter (B&G Vulcan 5) not showing boat/paddlewheel speed

I went through all the options and couldn't find any setting to compensate. There has to be a way!
__________________

__________________
Paul S
Blog - https://www.facebook.com/ohlson38project
website http://www.mildredrose.com
phantomracer is offline   Reply With Quote
Old 30-05-2017, 13:24   #3
Registered User

Join Date: Aug 2015
Posts: 48
Re: Plotter (B&G Vulcan 5) not showing boat/paddlewheel speed

boat speed is reporting speed through water and your GPS will report speed over ground, the blue arrow in the middle whas showing tide flow at 3kn.

So if SOG is 5kn and you are driving in to a 3kn tide flow then the STW should be 8Kn

Not sure what adjustment you made to the Triton gauge but would be interesting to see what happened to the speed if you did a 180 turn and when with the tide.
Rusty007 is offline   Reply With Quote
Old 30-05-2017, 13:34   #4
Registered User
 
phantomracer's Avatar

Join Date: Aug 2010
Location: Boston, MA
Boat: 1968 Ohlson 38 Sloop
Posts: 862
Images: 9
Send a message via Yahoo to phantomracer
Re: Plotter (B&G Vulcan 5) not showing boat/paddlewheel speed

Quote:
Originally Posted by Rusty007 View Post
boat speed is reporting speed through water and your GPS will report speed over ground, the blue arrow in the middle whas showing tide flow at 3kn.

So if SOG is 5kn and you are driving in to a 3kn tide flow then the STW should be 8Kn

Not sure what adjustment you made to the Triton gauge but would be interesting to see what happened to the speed if you did a 180 turn and when with the tide.
i was doing circles in the bay, the plotter 'boat speed' was always a LOT faster than the display's speed.

In the displays, there is a 'calibration' you can do. Mine is set to 68% of the paddlewheel actual speed. As much as I would like to say I am sailing at 9 knots.. i know it is not real

I just don't see a calibration in the plotter.

The depth keel offset calibration gets passed to the plotters fine. just not the calibrated boat speed
__________________
Paul S
Blog - https://www.facebook.com/ohlson38project
website http://www.mildredrose.com
phantomracer is offline   Reply With Quote
Old 31-05-2017, 18:25   #5
Registered User
 
phantomracer's Avatar

Join Date: Aug 2010
Location: Boston, MA
Boat: 1968 Ohlson 38 Sloop
Posts: 862
Images: 9
Send a message via Yahoo to phantomracer
Re: Plotter (B&G Vulcan 5) not showing boat/paddlewheel speed

Apparently I have Navico stumped.. have't got a reply from them. Not surprised. rarely get problems solved through their email.

Rusty, to adjust the speed on the Triton display (see attached pic) and on page 25: https://www.usna.edu/Sailing/documen...Instrument.pdf

This procedure does work for the displays (as you can see on my video).. but it doesn't propagate over the network like the depth offset does.

I don't see anything on the Vulcan 5 (or my HDS 8 for that matter) to calibrate the speed, like the triton display.
Attached Thumbnails
Click image for larger version

Name:	bandg_speed.jpg
Views:	98
Size:	53.4 KB
ID:	148870  
__________________
Paul S
Blog - https://www.facebook.com/ohlson38project
website http://www.mildredrose.com
phantomracer is offline   Reply With Quote
Old 02-06-2017, 15:01   #6
Registered User
 
phantomracer's Avatar

Join Date: Aug 2010
Location: Boston, MA
Boat: 1968 Ohlson 38 Sloop
Posts: 862
Images: 9
Send a message via Yahoo to phantomracer
Re: Plotter (B&G Vulcan 5) not showing boat/paddlewheel speed

Navico/B&G is still MIA. No reply from them yet. Called on the phone today. On hold for 50 minutes with 'no calls in front of me' so maybe they don't offer support anymore??

Either way, went to the boat and installed a software upgrade.

There now appears to be a 'calibration' setting for speed. So I set it. Will see if it did anything next time we go out.
__________________

__________________
Paul S
Blog - https://www.facebook.com/ohlson38project
website http://www.mildredrose.com
phantomracer is offline   Reply With Quote
Reply

Tags
boat, wheel

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
Lat & Long not showing in Status Bar, OpenCPN - Android Stingo OpenCPN 13 17-06-2016 14:24
Cpn not showing ais targets when not connected to routerr delcrest OpenCPN 15 11-08-2015 19:23
Best practice to remove old speed paddlewheel tube from hull phantomracer Construction, Maintenance & Refit 1 04-09-2014 12:12
B&G Network Quad Malfunction - Paddlewheel Jaden44 Marine Electronics 5 30-04-2011 09:41
B&G H2000 Paddlewheel Processor Input svBeBe Marine Electronics 0 28-03-2011 06:41

Advertise Here


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 04:23.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×

ShowCase vBulletin Plugins by Drive Thru Online, Inc.