Protractor looks usefull - SailNet Community
 
LinkBack Thread Tools
post #1 of 8 Old 06-18-2009 Thread Starter
Senior Member
 
davidpm's Avatar
 
Join Date: Oct 2007
Location: Madison
Posts: 4,043
Thanks: 273
Thanked 62 Times in 53 Posts
Rep Power: 8
 
Protractor looks usefull

Amazon.com: Weems & Plath Marine Navigation Protractor Triangle with Handle: Sports & Outdoors

I just bought this protractor triangle and it seems to be very handy.
I've tried all the other products, parallel rules etc and they all work fine on a chart table.

The protractor triangle seems like it will work on a knee.
Just keep the chart folded to best place.
Put the hypotenuse of the triangle on your course line.
Line up the center convergence point with a vertical line.
Read the degrees on the outside edge of the scale on that same line.
Pick either high or low numbers for either coming or going.
For me I add 15 to get magnetic and I have a course within one degree.
Easier to read than unfolding the chart and finding a rose then walking something over.

I haven't tried it on a boat yet but it looks promising.
davidpm is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 8 Old 06-18-2009
moderate?
 
camaraderie's Avatar
 
Join Date: May 2002
Location: East Coast
Posts: 13,877
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 16
     
This is MY favorite tool...it is all you need to plot any course on any chart on any surface, or read a heading true or magnetic of a drawn course.
ANY of this can be done is 10 seconds or less with no other tools except a pencil and NO calculation. It is Weems protractor #255.


No longer posting. Reach me by PM!
camaraderie is offline  
Quote Quick Reply Share with Facebook
post #3 of 8 Old 06-18-2009
Senior Member
 
Freesail99's Avatar
 
Join Date: Feb 2006
Location: New Jersey
Posts: 4,507
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
 
Send a message via Yahoo to Freesail99
Quote:
Originally Posted by camaraderie View Post
This is MY favorite tool...it is all you need to plot any course on any chart on any surface, or read a heading true or magnetic of a drawn course.
ANY of this can be done is 10 seconds or less with no other tools except a pencil and NO calculation. It is Weems protractor #255.

Cam is 100% right with this. I took his advice and bought the 255. It is fantastic !! Hands down the best tool for navigation.

S/V Scheherazade
-----------------------
I had a dream, I was sailing, I was happy, I was even smiling. Then I looked down and saw that I was on a multi-hull and woke up suddenly in a cold sweat.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Freesail99 is offline  
Quote Quick Reply Share with Facebook
post #4 of 8 Old 06-19-2009
Senior Member
 
Omatako's Avatar
 
Join Date: Sep 2003
Location: Auckland New Zealand
Posts: 2,558
Thanks: 1
Thanked 33 Times in 30 Posts
Rep Power: 12
 
Yep, got the same one as Cam and Freesail. It revolutionised my plotting ability.


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

__________________

"Two possibilities exist: Either we are alone in the Universe or we are not. Both are equally terrifying."

Arthur C. Clarke
Omatako is offline  
Quote Quick Reply Share with Facebook
post #5 of 8 Old 06-19-2009
Senior Member
 
Boasun's Avatar
 
Join Date: Feb 2007
Location: New Orleans, LA
Posts: 3,070
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 10
   
As a Professional Mariner, I prefer the triangle. Two of them in fact. I can plot faster with them then you can with parallel rulers.
But I do teach my students to use the triangle combined with the parallel ruler. Mainly because they are slow in picking up Nav Plotting at first. But their speed picks up in the second week.

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
Boasun is offline  
Quote Quick Reply Share with Facebook
post #6 of 8 Old 06-19-2009
Senior Member
 
Valiente's Avatar
 
Join Date: Jun 2006
Location: Toronto
Posts: 5,491
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
   
Heh...I know that as a CPS plotter (Canadian Power Squadron).

I know how to use triangles and parallel rulers and even the old three-armed model, but 99% of the time I use the "CPS plotter".

Can't sleep? Read my countdown to voyaging blog @
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Valiente is offline  
Quote Quick Reply Share with Facebook
post #7 of 8 Old 06-20-2009
Junior Member
 
Join Date: Jul 2005
Posts: 24
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
These are the great tools that I refer non-sailing friends to when asking about sailing gifts... Simple things that last and are extremely useful....

--jf
dvideohd is offline  
Quote Quick Reply Share with Facebook
post #8 of 8 Old 06-22-2009
Senior Member
 
jackdale's Avatar
 
Join Date: Dec 2008
Location: Calgary, AB, Canada
Posts: 9,041
Thanks: 27
Thanked 59 Times in 56 Posts
Rep Power: 7
 
I have used a Portland Plotter for years.



Jack

__________________
ISPA Yachtmaster Offshore Instructor Evaluator
Sail Canada Advanced Cruising Instructor
IYT Yachtmaster Coastal Instructor
ASA 201, 203, 204, 205, 206, 214
As I sail, I praise God, and care not. (Luke Foxe)
jackdale is online now  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome