1. A method of operation of a navigation system comprising: receiving user input regarding a navigation route for controlling guidance communication along the navigation route for a system user wherein the user input corresponds to a passive-navigation portion for representing one or more locations of the navigation route not requiring communication of the guidance communication for the system user; generating with a control circuit a user geographic-knowledge model based on the user input regarding the navigation route; calculating a system route based on the user geographic-knowledge model; and communicating the system route for guiding the system user in traversing the system route.
1. A method of operation of a navigation system comprising: receiving user input regarding a navigation route for controlling guidance communication along the navigation route for a system user wherein the user input corresponds to a passive-navigation portion for representing one or more locations of the navigation route not requiring communication of the guidance communication for the system user; generating with a control circuit a user geographic-knowledge model based on the user input regarding the navigation route; calculating a system route based on the user geographic-knowledge model; and communicating the system route for guiding the system user in traversing the system route. 6. The method as claimed in claim 1 wherein calculating the system route includes calculating the system route including a system-passive portion, a system-general portion, or a combination thereof based on the navigation route and the user geographic-knowledge model for controlling the guidance communication for the system route based on the navigation route previously utilized by the system user.