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