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What does "corridor navigation" mean?

ji.rui
2 months ago

Hi,

Page 17, GPSMAP 66i: 

You can use the GPS navigation features on your device to navigate a saved activity, route, or course.

Your device records your path as an activity. Activities use corridor navigation. When navigating a saved activity, it cannot be recalculated (Recordings, page 21).

What does "corridor navigation" mean?

  • 0 2 months ago

    Umm, no clue. Typo? This reference from the 66i manual is the ONLY reference I can find for this term. ??

  • 0 2 months ago in reply to twolpert

    I have submitted a request for information on the meaning of this term and will post the response here when I receive it.

  • +1 2 months ago

    We're sorry for any confusion caused by the description of the phrase 'corridor navigation' in the GPSMAP 66i manual.

    We use two methods of navigation when following a curvy line. The primary method that most are familiar with is the on-road routing with turn-by-turn directions, and this is the traditional automotive routing - if you go off-course, we re-calculate and then give a new line to follow.

    Corridor Navigation refers to our "Track Navigation", or now also "Course Navigation", when following a saved track or a course.

    With this method, we are assuming you are following a trail of sorts and it might make sense to divert off the course to avoid some sort of obstacle. In these cases when you go off-course we will not re-calculate, but rather point you back towards the line. In this case we also know that sometimes the recorded track or course might be somewhat inaccurate, since GPS conditions could be challenging. This pads out the width of the track so it becomes approximately 30 meters wide and if you are within that 30 meter "corridor" then you are considered on track - so the pointer assumes you just need to go forward on the track. Keep in mind this corridor is not shown on the map for you to see anywhere such as on the map, it's just happening "behind the scenes", if you will.

    If you are outside said corridor, then we will start to point you back towards the nearest point on the line. It also allows what we call "fast forward" or "rewind" support. So if you leave the course, you can re-enter at any point and we will jump our navigation to account for where you re-join the line.