OffSub GPS vs oldways Navigation equipment ?

[SmithDoor]

off subject I have been on ship or boat 1 time ​

.

⫷--❋ GPS vs OLD FASHIONE ❋--⫸​

I was looking up Design a simple SEXTANT.
The problem

After looking and reading hard to see the difference.
Now what is difference in a SEXTANT & ASTROLABE ?

[/b] .

Dave

FYI
Still working on vacuum engine on solar power

 

[SmithDoor]

Here is the old fashion.

VS the older way


There two types one is for Navigation

Dave

 

[Steamchick]

Someone will have made or demonstrate an astrolabe... (or whatever!). Next.
Or
The use of a plumb bob and square to make a level..
5000 years ago the use light - lines of sight - From stick to stick - to make straight lines (lines of sight) when they didn't understand light and eyes and thought the eyes projected beams to see. E.g. many temples and other monuments were accurately aligned to sun, stars, etc.
Fascinating!
K2

 

[SmithDoor]

I.

Someone will have made or demonstrate an astrolabe... (or whatever!). Next.
Or
The use of a plumb bob and square to make a level..
5000 years ago the use light - lines of sight - From stick to stick - to make straight lines (lines of sight) when they didn't understand light and eyes and thought the eyes projected beams to see. E.g. many temples and other monuments were accurately aligned to sun, stars, etc.
Fascinating!
K2

Thank you

I have use theodolite on dry land. Looks interesting to look at the sextant and astrolabe.

But internet on some post will totally different and others look same.

I know the will say on a rolling ship the Sextant is within 20 seconds. I this would closer to minutes. Then Navy best with a few reading can get within 3 notes.

Dave