Navigation Manager Access?
 

Is there a way to grant admins access to the navigation manager under settings in the ACP without granting full access to the other links in the settings menu?

Hmm good question... to my knowledge not by default and under Administrator Permissions there is no specific setting for that alone.

Curious though... why grant this to anyone other than the primary admin? Are you changing the navigation tabs that often and if so why? I'm curious to know what you're going for :D.

I want to grant access to a certain admins and the links change on a weekly/monthly basis pending what tournaments/events we run.

Problem is the navigation menu in ACP.
The navigation option requires by default "manage forums" or "manage styles", yet is located in the "settings" block of the menu, requiring "manage settings" to see it.

Dont know if the following is allowed to post, but you can try to edit your includes/xml/cpnav_vbulletin.xml file.
Move the navigation to another block like styles & templates (if your admins have access to this area).