Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 17-10-2018, 23:18   #1
Registered User
 
Sir_Crabs_A_Lot's Avatar

Join Date: Sep 2018
Location: Washington State
Boat: Steamboat, 25 ft
Posts: 63
Images: 1
Extended Light Sectors "setting"

I have read the manual, and looked into Flyspray, and cannot seem to see anything on this:

When "hovering" near a nav light, an Extended Light Sector appears. This is good, but depending on the light the extended sector arc can appear anywhere from 1NM to 2.5NM out on charts at the same scale (according to the chart scale stated at the right hand side of the Status Bar).

Is there a "control" somewhere that lets you set this distance?

Ryan
__________________

__________________
"Science, my lad, is made up of mistakes, but they are mistakes which
it is useful to make, because they lead little by little to the truth" - Jules Verne
Sir_Crabs_A_Lot is offline   Reply With Quote
Old 18-10-2018, 00:21   #2
bcn
Registered User

Join Date: May 2011
Location: underway whenever possible
Boat: Rangeboat 39
Posts: 3,191
Re: Extended Light Sectors "setting"

In the object properties of the lights you will find the visibility range of the arcs.

The presented arc when hovering is scaled to 1/3 of the real range: 8nm results in 2.67nm on the canvas as in the example.
Attached Thumbnails
Click image for larger version

Name:	Captura de pantalla 2018-10-18 a las 8.15.00.png
Views:	88
Size:	154.4 KB
ID:	179149   Click image for larger version

Name:	Captura de pantalla 2018-10-18 a las 8.15.55.png
Views:	94
Size:	128.5 KB
ID:	179150  

__________________

bcn is offline   Reply With Quote
Old 18-10-2018, 01:00   #3
Registered User

Join Date: Feb 2012
Location: Austria
Posts: 218
Re: Extended Light Sectors "setting"

Have learned something new again - great!
I assume the 1/3 of real range has been taken just as it appears to be sensible - or is there a way to change this value in the ini file to e.g. 100%
skipperearly is offline   Reply With Quote
Old 18-10-2018, 01:53   #4
bcn
Registered User

Join Date: May 2011
Location: underway whenever possible
Boat: Rangeboat 39
Posts: 3,191
Re: Extended Light Sectors "setting"

Quote:
Originally Posted by skipperearly View Post
Have learned something new again
me too
bcn is offline   Reply With Quote
Old 18-10-2018, 06:35   #5
Registered User
 
rgleason's Avatar

Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 12,060
Re: Extended Light Sectors "setting"

Is this worthy of mention in the manual?

If so, where please?
rgleason is offline   Reply With Quote
Old 18-10-2018, 09:50   #6
Registered User

Join Date: Dec 2005
Location: Helsingborg, Sweden
Boat: Dufour 35
Posts: 3,423
Re: Extended Light Sectors "setting"

Quote:
Originally Posted by rgleason View Post
Is this worthy of mention in the manual?

If so, where please?

From the documentation:

https://opencpn.org/wiki/dokuwiki/doku.php?id=opencpnpencpn_user_manual:charts:vec tor_display_tab

Quote:
Activating the Extended Light sectors clarifies the situation. All sectors are extended and leading white sectors are emphasized in yellow and extend the full nominal range of the light. Just hold the cursor over a light and the extended sectors are activated.
So this is, or was, the original intention, when the feature was introduced.
I still think that it's good to quickly see the nominal range.
Now I get different results from different charts. Cm93 and oeSENC are not showing the same. bcn findings confirms this. I'll look in to this.....later.

Thomas
cagney is offline   Reply With Quote
Old 18-10-2018, 12:44   #7
bcn
Registered User

Join Date: May 2011
Location: underway whenever possible
Boat: Rangeboat 39
Posts: 3,191
Re: Extended Light Sectors "setting"

Quote:
Originally Posted by cagney View Post
Now I get different results from different charts. Cm93 and oeSENC are not showing the same. bcn findings confirms this. I'll look in to this.....later.

Thomas
My example comes from plain S-57 getting the same presentation with 1/3 of real range for oeSENC and S-63.

Hubert
bcn is offline   Reply With Quote
Old 18-10-2018, 13:29   #8
Registered User

Join Date: Dec 2005
Location: Helsingborg, Sweden
Boat: Dufour 35
Posts: 3,423
Re: Extended Light Sectors "setting"

In the file "s52cnsy.cpp" in O:s source code the following quote is embedded as a comment.
Quote:
Notes on light sectors:
// 1.) The radial leg-lines defining the light sectors are normally drawn to only 25mm
// from the light to avoid clutter (see Part C). However, the mariner should be able to
// select "full light-sector lines" and have the leg-lines extended to the nominal range
// of the light (VALMAR).
It seems that this is required by the S52 standard. So if O does not follow along, it may be a bug.

Thomas
cagney is offline   Reply With Quote
Old 18-10-2018, 13:39   #9
Registered User
 
rgleason's Avatar

Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 12,060
Re: Extended Light Sectors "setting"

Yes, Vector Display Tab - Bouys Lights - Extended Light Sectors

Does have some information, but not the aspect that BCN notes
"The presented arc when hovering is scaled to 1/3 of the real range: 8nm results in 2.67nm on the canvas as in the example. "


or am I missing something in the manual?


Thomas, please do check it, but shouldn't we just add bcn's two images and a description about hovering?


PS: Thomas' note below appeared later.
rgleason is offline   Reply With Quote
Old 18-10-2018, 13:41   #10
bcn
Registered User

Join Date: May 2011
Location: underway whenever possible
Boat: Rangeboat 39
Posts: 3,191
Re: Extended Light Sectors "setting"

Mmmh - the vectors (lines) are drawn as the range described - just the colored sectors are at 1/3.
Attached Thumbnails
Click image for larger version

Name:	Captura de pantalla 2018-10-18 a las 21.37.22.png
Views:	36
Size:	135.5 KB
ID:	179175  
bcn is offline   Reply With Quote
Old 18-10-2018, 13:41   #11
Registered User

Join Date: Nov 2012
Location: Orust Sweden
Boat: Najad 34
Posts: 2,306
Re: Extended Light Sectors "setting"

On my Win10 (Although master O 4.99.0 but I suppose this hasn't changed?)
The leading light sectors are correct presented for all my charts. CM93, S-57 and oeSENC??
oeSENC chart on the shot.

Håkan
Attached Thumbnails
Click image for larger version

Name:	sector.PNG
Views:	43
Size:	166.3 KB
ID:	179174  
Hakan is online now   Reply With Quote
Old 18-10-2018, 15:15   #12
Registered User
 
rgleason's Avatar

Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 12,060
Re: Extended Light Sectors "setting"

After using Opencpn 4.8.6 and turning on "Extended Light Sectors" with CM93 and GC01enc I had trouble seeing what difference it made. Hovering oveer the lights does nothing.


It appears to me that the hoover functionalty was added with v4.99.
At this point I have no idea what the check box "Extended Light Sectors" does in version 4.8.6, I certainly don't see extend light sectors with CM93 or CG01enc.
rgleason is offline   Reply With Quote
Old 18-10-2018, 15:22   #13
Marine Service Provider

Join Date: May 2013
Location: Norway
Posts: 670
Re: Extended Light Sectors "setting"

Works fine using 4.8.6 running Xubntu CM93

Quote:
Originally Posted by rgleason View Post
After using Opencpn 4.8.6 and turning on "Extended Light Sectors" with CM93 and GC01enc I had trouble seeing what difference it made. Hovering oveer the lights does nothing.


It appears to me that the hoover functionalty was added with v4.99.
At this point I have no idea what the check box "Extended Light Sectors" does in version 4.8.6, I certainly don't see extend light sectors with CM93 or CG01enc.
petter5 is offline   Reply With Quote
Old 18-10-2018, 16:41   #14
Registered User
 
rgleason's Avatar

Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 12,060
Re: Extended Light Sectors "setting"

Quote:
Originally Posted by petter5 View Post
Works fine using 4.8.6 running Xubntu CM93

Tried it again. This time I tried it with Opengl off and toggled the Extended Light checkbox, and it works fine.
Then turned on Opengl and it still works.

Perhaps it was user error.


Quote:
It appears to me that the hoover functionalty was added with v4.99.
At this point I have no idea what the check box "Extended Light Sectors" does in version 4.8.6, I certainly don't see extend light sectors with CM93 or CG01enc.

This is incorrect.


---
I still wonder about the changes to v4.99
rgleason is offline   Reply With Quote
Old 19-10-2018, 00:27   #15
Registered User

Join Date: Dec 2005
Location: Helsingborg, Sweden
Boat: Dufour 35
Posts: 3,423
Re: Extended Light Sectors "setting"

I have now checked on 4.8.6, an as far as I can say it works as intended.
The point is that a leading sector extend all the way to it's nominal range, while other sectors are extended much less.
Don't worry about 4.99 ++, just yet, there isn't even a beta release.

Thomas
__________________

cagney is offline   Reply With Quote
Reply

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
Setting up a new Transat Yacht "race"....... David_Old_Jersey Challenges 19 07-05-2013 11:42
LED light turned Nav light BLUE!!! MarkJ Electrical: Batteries, Generators & Solar 19 28-01-2009 10:19
"recent price reduction""owner anxious""bring all offers" sailorboy1 Dollars & Cents 10 22-01-2009 12:25
AIR How light is to light to sail in? Perithead Off Topic Forum 26 04-12-2007 18:52



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 16:04.


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.