Need Opinion: Chart plotter, north up or course up? - Page 2 - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > General Interest Forums > General Discussion (sailing related)
 Not a Member? 


Like Tree16Likes
Reply
 
LinkBack Thread Tools
  #11  
Old 07-09-2013
kellysails's Avatar
Puget Sound Pounder
 
Join Date: Nov 2008
Location: Bainbridge Island, Port Madison, WA
Posts: 593
Thanks: 16
Thanked 6 Times in 6 Posts
Rep Power: 6
kellysails is on a distinguished road
Re: Need Opinion: Chart plotter, north up or course up?

Quote:
Originally Posted by killarney_sailor View Post
Interesting that people say they go north up because of paper charts. From Scouts to university in geography I always oriented the map/chart to the course I wanted to follow rather than to north. Heck the m/c has true north at the top,not even magnetic.

On the boats generally have course up except in tight corners where I want the land features to stay in one place even I'd the course is changing frequently.
Exactly! After a few years in the military and doing a fair amount of land nav the "map" was always oriented to course up. Then the transition to boating the RYA beat into my head that "charts" need to be oriented North up. Now I have a new chart plotter that gives me the option and with a mixed experienced crew.
Reply With Quote Share with Facebook
  #12  
Old 07-09-2013
northoceanbeach's Avatar
first sailed january 2008
 
Join Date: Mar 2008
Location: California or bust
Posts: 875
Thanks: 7
Thanked 6 Times in 6 Posts
Rep Power: 7
northoceanbeach is on a distinguished road
Re: Need Opinion: Chart plotter, north up or course up?

North up. I find it easier to follow.
Reply With Quote Share with Facebook
  #13  
Old 07-09-2013
Senior Member
 
Join Date: Aug 2006
Location: Norway
Posts: 565
Thanks: 3
Thanked 43 Times in 39 Posts
Rep Power: 8
knuterikt is on a distinguished road
Re: Need Opinion: Chart plotter, north up or course up?

Quote:
Originally Posted by kellysails View Post
I think heading is the direction the boat is pointing and course is the actual path the boat is taking. This takes into account set/run effects of the current/wind.
Different vendors might have different definitions..
This is from the manual of my Furuno NN3D MFD8
Quote:
Description of orientation modes

Head-up: Displays the chart with the current compass heading of your vessel at the top of the screen. The heading data from a compass is required. When the heading changes, the boat icon remains fixed, and the chart picture rotates according to heading.

North-up: North is at the top of the screen. When your heading changes, the boat icon moves according to heading. This mode is for long-range navigation.

Course-up: The chart picture is stabilized, and shown with your current course (overground) at the top of the screen. The boat icon moves with the heading. If you select a new course, the picture resets to display the new course at the top of the screen.
I might be wrong - but the "If you select a new course" statement above indicate that they are talking about "selecting course as selecting new way point"
I switch between North up and heading up depending on what I'm doing.
For inshore navigation I prefer HU, for orienting and planning I switch to NU.

I know the difference between COG and heading.
My plotter also have a heading line and a COG/SOG predictor (that is independent of the orientation mode.
Reply With Quote Share with Facebook
  #14  
Old 07-09-2013
bljones's Avatar
Senior Member
 
Join Date: Oct 2008
Location: South Coast Ontario
Posts: 8,069
Thanks: 31
Thanked 68 Times in 61 Posts
Rep Power: 7
bljones has a spectacular aura about bljones has a spectacular aura about
Re: Need Opinion: Chart plotter, north up or course up?

North up. it is a chart plotter, not a TomTom, so it should be chart oriented as an honest- to-neptune paper chart is oriented. Orienting to course risks spatial disorientation as your compass (you still use a compass, right?) and chart differentiate wildly, especially after dark.
__________________
It's 5 o'clock somewhere:


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #15  
Old 07-09-2013
DRFerron's Avatar
A mod and her dragon
 
Join Date: Nov 2005
Location: SE Pennsylvania
Posts: 3,134
Thanks: 23
Thanked 88 Times in 86 Posts
Rep Power: 10
DRFerron is on a distinguished road
Re: Need Opinion: Chart plotter, north up or course up?

Quote:
Originally Posted by bljones View Post
North up. it is a chart plotter, not a TomTom, so it should be chart oriented as an honest- to-neptune paper chart is oriented. Orienting to course risks spatial disorientation as your compass (you still use a compass, right?) and chart differentiate wildly, especially after dark.
I'm not sure that I understand your example. I don't turn my paper chart so that it's always oriented north even when my boat is not. I must be missing something.
__________________
Donna


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Catalina 30 TRFK

Contributing Editor
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
magazine

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Rock Hall Cruising Station

All things that are, are equally removed from being nothing. John Donne
Reply With Quote Share with Facebook
  #16  
Old 07-09-2013
bljones's Avatar
Senior Member
 
Join Date: Oct 2008
Location: South Coast Ontario
Posts: 8,069
Thanks: 31
Thanked 68 Times in 61 Posts
Rep Power: 7
bljones has a spectacular aura about bljones has a spectacular aura about
Re: Need Opinion: Chart plotter, north up or course up?

Charts are north oriented., ie north is top of page.
Nav stations are designed to fit charts with north up orientation.
ergo, all plotting is done with north up.
looking down on the chart laid out on the nav with the course marked (you do use a paper chart back up, right?), then looking at the plotter, whihc is course oriented will cause a momentary unnecessary spatial disorientation.


Which is compounded by boat manufacturers insisting on installing nav stations whihc face the stern, not the bow.
__________________
It's 5 o'clock somewhere:


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #17  
Old 07-09-2013
DRFerron's Avatar
A mod and her dragon
 
Join Date: Nov 2005
Location: SE Pennsylvania
Posts: 3,134
Thanks: 23
Thanked 88 Times in 86 Posts
Rep Power: 10
DRFerron is on a distinguished road
Re: Need Opinion: Chart plotter, north up or course up?

North up in relation to me. Got it.
__________________
Donna


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Catalina 30 TRFK

Contributing Editor
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
magazine

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Rock Hall Cruising Station

All things that are, are equally removed from being nothing. John Donne
Reply With Quote Share with Facebook
  #18  
Old 07-09-2013
chef2sail's Avatar
Senior Member
 
Join Date: Nov 2007
Location: Maryland
Posts: 6,706
Thanks: 23
Thanked 47 Times in 43 Posts
Rep Power: 7
chef2sail will become famous soon enough
Send a message via AIM to chef2sail
Re: Need Opinion: Chart plotter, north up or course up?

True the paper chart is printed with orientation to the north. That makes sense though because that is the only thing that is a standardization to. It would not be possible to print charts in a head up orientation. That alone is not reason to create everything north on the boat. In addition charts can be rotated and moved.

Our nav station faces forward, the chart table is large enough to rotate the chart 360 degrees. If my bow is facing E and I intend on traveling that way I orient my paper chart that way at the nav station as well as in the cockpit.

If my bow is facing E and there are rocks in front of me visually, I don't want my paper chart facing north so they are 90 degrees to the right of me when I look at it, I want to rotate the chart so they are ahead of me. When I glance down at the chart and there is a river to the left, and I look up the river is to the left. No room for error or need for computation. That's why I have the CP in a head up orientation.

While I can make that shift if I can keep things in a north orientation many newer people or inexperienced cannot easily I have found. They need to confirm visually what they have looked down at on a chart and then look up again to get their bearings..

However all this said, there is no ultimate CORRECT way to do this. You should do whatever makes you comfortable as well as so the rest of your crew can understand also if necessary.

Makes no difference what orientation you keep, as long as you can read your position safely
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
___________________________
S/V Haleakala (Hawaiian for" House of the Sun")
C&C 35 MKIII Hull # 76
Parkville, Maryland
(photos by Joe McCary)
Charter member of the Chesapeake Lion posse

Our blog-
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


“Sailing is just the bottom line, like adding up the score in bridge. My real interest is in the tremendous game of life.”- Dennis Conner
Reply With Quote Share with Facebook
  #19  
Old 07-09-2013
poopdeckpappy's Avatar
Senior Member
 
Join Date: Jul 2006
Location: San Diego
Posts: 5,468
Thanks: 22
Thanked 37 Times in 31 Posts
Rep Power: 9
poopdeckpappy has a spectacular aura about poopdeckpappy has a spectacular aura about
Re: Need Opinion: Chart plotter, north up or course up?

Quote:
Makes no difference what orientation you keep, as long as you can read your position safely
Yes, agreed
__________________
1978 Tayana 37

Freedom comes when you’re ready to sail away. True freedom comes when you don’t have to return


Cut off from the land that bore us, betrayed by the land we find, where the brightest have gone before us and the dullest remain behind, .......but stand to your glasses, steady,.......tis all we have left to prize, raise a cup to the dead already, hurrah for the next that dies
Reply With Quote Share with Facebook
The Following User Says Thank You to poopdeckpappy For This Useful Post:
DJR351 (07-10-2013)
  #20  
Old 07-09-2013
kellysails's Avatar
Puget Sound Pounder
 
Join Date: Nov 2008
Location: Bainbridge Island, Port Madison, WA
Posts: 593
Thanks: 16
Thanked 6 Times in 6 Posts
Rep Power: 6
kellysails is on a distinguished road
Re: Need Opinion: Chart plotter, north up or course up?

All sorts of interesting opinions here, thanks! It's a sailnet trademark above all else.

I may give course up another try on my plotter that sits in front of the wheel in the cockpit. I can see that in rough weather it could be quite disconcerting though.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Laptop as a Chart Plotter daddyhobbit Electronics 38 03-10-2012 02:15 PM
chart plotter badsanta Gear & Maintenance 3 05-07-2009 11:00 AM
Chart plotter badsanta Gear & Maintenance 5 11-19-2008 09:52 PM
Electronic Chart Plotter SledDog Gear & Maintenance 5 08-23-2006 07:56 PM
Chart Plotter Installation rpowell Gear & Maintenance 3 12-31-2001 06:29 AM


All times are GMT -4. The time now is 07:39 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012