Do not have a Charger, have not stolen one for a test fly, so consider all of the following kibutzing from the balcony.
The Navigator small package contains a 45-55cm bar with 20m lines and 3m extensions
The Navigator medium package contains a 45-55cm bar with 23m lines and 3m extensions
The Navigator large package contains a 55-65cm bar with 23m lines and 3m extensions
For the Charger 8, the Small package is recommended
For the Charger 10/12/15, the Medium package is recommended
For the Charger 19, the Large package is recommended.
It's probably doable, but a quick peak of the
Navigator feature list lists quite a few bells and whistles on the bar. How important they are to you in the short run, and whether there is a
Navigator upgrade somewhere in your tea leaves is something you are going to have to break out the Magic 8 Ball for.
Phree/Carl/Feyd/others will probably have something more cogent to say on the matter.
ATB,
Sam
P.S. Sorry for the commercial link to a non-PKF retailer, but the PL site's link to information on the Navigator bar is totally FUBAR.
"I never had any friends later on like the ones I had when I was 12 - Jesus, does anyone?" - The Body by Stephen King