What is Corridor Navigation on the GPSMAP 66 and 67 Series?

The GPSMAP® 66sr, 66i, 66s, 66st, 67, and 67i outdoor handhelds use two methods of navigation when following a curvy line:

• Turn-by-Turn Navigation: This is the primary method that most are familiar with and is used to follow routes on roads and/or trails. If you go off of the route, the device will re-calculate which roads and/or trails to use and then give a new line to follow.

• Corridor Navigation: This is used when following a saved activity, course, or track. If you go off-course the device will not re-calculate, but rather point you back towards the line.

With corridor navigation it is assumed that you are following a trail of sorts and it might make sense to divert off the trail to avoid some sort of obstacle. Instead of recalculating you would be pointed back towards the line in this case. It is also possible that the recorded activity, course, or track might be somewhat inaccurate due to challenging GPS conditions. Corridor navigation pads out the width of the activity, course, or track so it becomes approximately 30 meters wide and if you are within that 30 meter "corridor" then you are considered to be on the right path - so the pointer assumes you just need to go forward on the activity, course, or track. Keep in mind this corridor is not actually displayed anywhere, but is happening behind the scenes.

If you are outside said corridor, then you will be pointed back towards the nearest point on the line. Corridor navigation also allows what is known as "fast forward" or "rewind" support. So if you leave the activity, course, or track, you can re-enter at any point and navigation will continue from wherever you re-join the line.