GPSMAP 496 Owner’s Manual MAIn Menu > setuP tAbroute preference—allows the unit to calculate a route for:Faster time—routes calculated are faster to drive, but can belonger in distance.Shorter Distance—routes calculated are shorter in distancebut can take more time to drive.off road—creates a direct line from your current locationto your destination. This is useful when you are travellingoutside of detailed map coverage areas or where no roadsexist.ask My preference—determines whether you are asked to select aroute preference before route calculations.Calculation Method—sets how the unit searches for the route.Quickest Calculation—calculates the route the quickest, butit might not produce the best route.Quick Calculation—takes more time to calculate, butgenerates a better quality route.Better route—generates an even better quality route, butuses a longer calculation time.Best route—generates the optimal route, but takes thelongest time to calculate.•••••••Calculate routes for—sets route calculation for the particularvehicle you are operating to optimize the route for your vehicle type;some roads have vehicle-based restrictions.avoid—allows you to avoid certain road types and maneuvers onyour route. The unit uses these road types only if alternative routestake you too far out of your way or if no other road is available.Custom avoids—allows you to enter specific areas and roads thatyou would like to avoid in your navigation. Refer to page 62 forinformation on creating custom avoids.Custom road prefs—allows you to avoid or use Major, Medium,and Minor roads using a slider scale. This is especially nice if youwant to avoid major highways, for example.Guidance Sub TabTo open the Guidance sub tab, press MEnU twice to open the MainMenu. Select Setup from the vertical tab list. Then select guidancefrom the row of tabs along the top of the page.