No such navigation action exists. You'll need to either 1) Search for a plug-in that will do this; 2) write your own plug-in to do it; or 3) Open a feature request to add such functionality.
UPDATE
The "Go to Line" dialog was enhanced to be "Go to Line:Column". You can open it by:
- Ctrl+G / ⌘+L
- Menu: Navigate > Line:Column
- Click on the cursor position in the bottom right of the window. For example:
This will open the Go to Line:Column dialog:
In the dialog, you can enter a value such as 10:15
to go to the 15th character on line 10. You can also enter just a line, 10
which will take you to the start of that line (line 10 in this example). Or you can enter just a character position, for example :15
, which will take you to that character position on the current line.
However, I am still unaware of a way say "Navigate to the Nth character position in the file". And the original poster's feature for such a feature is still open.