Distance help - 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 > General Discussion (sailing related)
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #1  
Old 09-23-2010
Senior Member
 
Join Date: Aug 2009
Posts: 344
Thanks: 0
Thanked 16 Times in 15 Posts
Rep Power: 6
ScottUK is on a distinguished road
Distance help

I am trying to get an accurate calculation of the distance in NM of a trip I did a few years back. It started in Symi and ended at Capo Carbonara at the SE corner of Sardinia. The trip was via Kythira, Messina and Ustica. Any help would be appreciated.

Cheers
Reply With Quote Share with Facebook
  #2  
Old 09-23-2010
svHyLyte's Avatar
Old as Dirt!
 
Join Date: Nov 2008
Location: Tampa Bay Area
Posts: 2,626
Thanks: 11
Thanked 98 Times in 93 Posts
Rep Power: 6
svHyLyte is on a distinguished road
Go to Google Earth; Click on the distance measuring tool (i.e. the Ruler); click on the "Path" tab and then lay out the path/course you followed. The distance will be displayed.
__________________
"It is not so much for its beauty that the sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."
Reply With Quote Share with Facebook
  #3  
Old 09-23-2010
Senior Member
 
Join Date: Aug 2009
Posts: 344
Thanks: 0
Thanked 16 Times in 15 Posts
Rep Power: 6
ScottUK is on a distinguished road
cheers
Reply With Quote Share with Facebook
  #4  
Old 09-23-2010
paulk's Avatar
Senior Member
 
Join Date: Jun 2000
Location: CT/ Long Island Sound
Posts: 2,533
Thanks: 4
Thanked 20 Times in 19 Posts
Rep Power: 15
paulk is on a distinguished road
We used this method to check the distance on one of our handicap races. The problem came in being able to focus the satellite picture well enough to actually see the buoys in it so we could mark them for the ruler.
Reply With Quote Share with Facebook
  #5  
Old 09-24-2010
Boasun's Avatar
Senior Member
 
Join Date: Feb 2007
Location: New Orleans, LA
Posts: 3,063
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 9
Boasun will become famous soon enough Boasun will become famous soon enough
Ask the Race committee for the cordinates of the start & finish lines and of the positions of the Race buoys. Then work from there.
__________________
1600 Ton Master, 2nd Mate Unlimited Tonnage

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

S/V Rapture
Reply With Quote Share with Facebook
  #6  
Old 09-24-2010
Senior Member
 
Join Date: Jul 2006
Posts: 1,370
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 9
puddinlegs is on a distinguished road
Distance races... mark positions are almost alway given with lat. long. coordinates in the S.I.'s these days. To the OP, why not just pick up the charts? They always make souvenirs anyway.
Reply With Quote Share with Facebook
  #7  
Old 09-24-2010
Senior Member
 
Join Date: Aug 2009
Posts: 344
Thanks: 0
Thanked 16 Times in 15 Posts
Rep Power: 6
ScottUK is on a distinguished road
I was just looking at an atlas of the Med and saw that the delivery trip I had referred to measured approximately 18 degrees from east to west and 2 degrees from north to south. So the trip, from the atlas, was about 20 degrees in distance and would constitute 1200nm. I understand travelling the rhumb line would decrease the distance but we travelled a bit south so would add distance and so pretty much negates the shortened rhumb line distance. That said, from google earth the distance measured to just over 900nm. I understand an atlas is not a precision document but the differential is 300nm so I am at a loss.

As far as picking up the charts I would prefer to get rid of a lot of my stuff rather than adding to it. Should I be sailing in the area again and need the charts I would acquire them.

Cheers
Reply With Quote Share with Facebook
  #8  
Old 09-24-2010
Boasun's Avatar
Senior Member
 
Join Date: Feb 2007
Location: New Orleans, LA
Posts: 3,063
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 9
Boasun will become famous soon enough Boasun will become famous soon enough
Quote:
Originally Posted by ScottUK View Post
I understand travelling the rhumb line would decrease the distance but we travelled a bit south so would add distance and so pretty much negates the shortened rhumb line distance. That said, from google earth the distance measured to just over 900nm. I understand an atlas is not a precision document but the differential is 300nm so I am at a loss.
Cheers
Actually traveling the Great Circle Route is the shorter distance. But on a Mercator chart it does appear to be longer. But it isn't. Rhumb line tracks on coastal charts or larger scale charts, are good enough for general sailing. Not that much difference in the distances.
__________________
1600 Ton Master, 2nd Mate Unlimited Tonnage

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

S/V Rapture
Reply With Quote Share with Facebook
  #9  
Old 09-24-2010
svHyLyte's Avatar
Old as Dirt!
 
Join Date: Nov 2008
Location: Tampa Bay Area
Posts: 2,626
Thanks: 11
Thanked 98 Times in 93 Posts
Rep Power: 6
svHyLyte is on a distinguished road
Quote:
Originally Posted by ScottUK View Post
I was just looking at an atlas of the Med and saw that the delivery trip I had referred to measured approximately 18 degrees from east to west and 2 degrees from north to south. So the trip, from the atlas, was about 20 degrees in distance and would constitute 1200nm.

Cheers
Ah... Well, No actually.

At approximately 37º North, 1 minute of Longitude does not equal 1 NM but rather about .81 miles or, roughly, 49 miles per degree. Your trip would have been roughly 1002 miles.

FWIW...
__________________
"It is not so much for its beauty that the sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."
Reply With Quote Share with Facebook
  #10  
Old 09-24-2010
Senior Member
 
Join Date: Aug 2009
Posts: 344
Thanks: 0
Thanked 16 Times in 15 Posts
Rep Power: 6
ScottUK is on a distinguished road
Thanks for staightening out my oversight. Obviously that is why you use latitude to measure distances on a chart.
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
Buying from a distance zerubb Boat Review and Purchase Forum 16 11-11-2010 06:35 PM
Shortest distance Slayer Seamanship & Navigation 11 05-05-2010 01:55 PM
Clutch to winch distance mazzy Gear & Maintenance 8 04-07-2008 05:45 PM
time & distance ligal General Discussion (sailing related) 16 07-30-2007 01:00 PM
figuring distance from Lat/lon c172guy Seamanship & Navigation 8 06-10-2004 04:02 PM


All times are GMT -4. The time now is 08:03 PM.

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

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.