SailNet Community - View Single Post - roller plotter or parallel rulers?
View Single Post
post #18 of Old 09-26-2012
Senior Member
jackdale's Avatar
Join Date: Dec 2008
Location: Calgary, AB, Canada
Posts: 9,044
Thanks: 27
Thanked 59 Times in 56 Posts
Rep Power: 7
Re: roller plotter or parallel rulers?

Originally Posted by Hudsonian View Post
I find the Davis One Arm Protractor easiest to use-- particularly, when at the helm I'm working with a chartbook in my lap. Parallel rulers, roller plotter, and a pair of triangles all require a flat surface.
and ideally charts without any creases or folds.

I have a Davis plotter as well. I like the sturdy construction of the Portland plotter and the ability of account for variation. I have some instructions that show how to account for deviation as well, but since none of the boats I sail have deviation cards, I have not tried out that feature.

The parallel rule is nice for doing a faster advanced LOP. But I am almost as fast with the Portland.

My next best "plotter" is the Douglas protractor. Not mentioned yet.

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 offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome