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Forum: Navigation

20-12-2010, 13:47

Replies: 174

In Creating a Route on Charts, Do You Use True or Magnetic ?

Views: 29,733

Posted By Lodesman

The terms are synonymous. The helmsman steers by...

The terms are synonymous. The helmsman steers by compass.

Neat reference (not for navigation;)): https://upload.wikimedia.org/wikipedia/commons/2/28/Mv-world.jpg

Forum: Navigation

20-12-2010, 09:19

Replies: 174

In Creating a Route on Charts, Do You Use True or Magnetic ?

Views: 29,733

Posted By Lodesman

You mean 'variation'. 'Deviation' is caused by...

You mean 'variation'. 'Deviation' is caused by the magnetic influences in your boat - I should hope that doesn't change that much.

Forum: Navigation

08-11-2010, 09:18

Replies: 174

In Creating a Route on Charts, Do You Use True or Magnetic ?

Views: 29,733

Posted By Lodesman

It's been quite a while, but iirc aero charts...

It's been quite a while, but iirc aero charts don't have compass roses on them, so for planning purposes you measure your track against meridians with a Douglas (square) protractor, which gives True;...

Forum: Navigation

08-11-2010, 08:51

Replies: 174

In Creating a Route on Charts, Do You Use True or Magnetic ?

Views: 29,733

Posted By Lodesman

Well Mssrs Rousmaniere and Smith have obviously...

Well Mssrs Rousmaniere and Smith have obviously not polled the navigators on this forum ;)

Forum: Navigation

08-11-2010, 04:44

Replies: 174

In Creating a Route on Charts, Do You Use True or Magnetic ?

Views: 29,733

Posted By Lodesman

Methods have changed over the past hundreds of...

Methods have changed over the past hundreds of years, so the "proper way" is the one that has evolved. We no longer sail into the uncharted abyss, we know what longitude is, and plane sailing is no...

Forum: Navigation

25-10-2010, 05:19

Replies: 174

In Creating a Route on Charts, Do You Use True or Magnetic ?

Views: 29,733

Posted By Lodesman

Exactly! In your previous post you made the point...

Exactly! In your previous post you made the point that Magnetic was a "theoretical" point between the useable Compass and True - I totally agree with that.

For Barnie I'll clarify my "useless"...

Forum: Navigation

23-10-2010, 06:00

Replies: 174

In Creating a Route on Charts, Do You Use True or Magnetic ?

Views: 29,733

Posted By Lodesman

I don't think anyone has suggested otherwise; I...

I don't think anyone has suggested otherwise; I inferred from the OP that the question was to do with labelling the lines. The OP specifically asked about route plotting; the other part of chartwork...

Forum: Navigation

22-10-2010, 14:11

Replies: 174

In Creating a Route on Charts, Do You Use True or Magnetic ?

Views: 29,733

Posted By Lodesman

Why would you plot in Mag? The chart is True and...

Why would you plot in Mag? The chart is True and the compass is Compass. You can put the Variation and Deviation together to give a single conversion from T to C or vice versa; and you change this...

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