To my knowledge, NAV does not have an offline solution.. there is a mobile product that could be of use to you (via iPhone or iPad) where you can do work on the device and then sync the changes back to NAV. It is called Qiwi Mobility, and it has a true "offline capabilities" where it stores all of the data on the device "SQL Lite DB" and whenever something is changed, it marks it as modified and then when you go back into "online" mode you can sync the changes that have been made. Because of it's flexibility, you can do anything in Qiwi that you can do in NAV. I suggest talking to your Partner about this.
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