Windy Tops

Tag: gps

  • GPSs and Cognitive Mapping, or lack of it

    Late in 2010, I expressed some concerns about uses and perceptions of GPS receivers and similar technology. This article published in the New York Times (copied verbatim here if the NYT tries to force you to subscribe) refers to some of the concerns I share with risks relating GPS use. It’d be silly not to agree how fantastically useful it is to be able to pinpoint one’s position, especially in situations where safety demands it. On the other hand, it’s easy to get into habits of GPS use which don’t merely reduce one’s awareness in an immediate situation, but might also hinder those mental skills from being exercised or developing.

    A point made in the article is that the more traditional use of a map, which in a back-country context would sometimes be augmented by tools such as compasses and altimeters, requires a person to repeatedly refer to the surrounding physical world. It exercises parts of the brain responsible for generating cognitive maps of the surrounding area. Once a person begins to rely more on a GPS, these skills and abilities are lost, and spatial abilities degrade.
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  • GPSs, Compasses and Navigation

    Back in July, I wrote something about reports of a quick and painless helicopter rescue of a couple of people who’d become lost on Quoin Ridge, and especially how it was reported that they were in trouble due to a failure of their GPS. The point I was really trying to make was that the way it was reported, through propagation of a couple of simplified press releases that stated limited facts without analysis, implicitly validated reliance on a GPS as an acceptable way of avoiding getting lost, not to mention a cellphone as a rescue alert device, even though neither of these things is great to rely on. (I have no idea whether the reports accurately reflect what actually happened.)

    Reading about the incident, probably because of how it was reported, had me thinking more about why I don’t really trust GPSs in the outdoors. Actually, it’s not so much that I don’t trust a GPS as that I don’t think they naturally encourage a really good navigation sense as well as a map and compass can.

    I bought a GPS about a year ago, primarily for keeping track of where I’ve been. I usually just leave it switched on in the top of my pack, and it works very well. At the time, I expressed some concern that I might be less motivated to practice navigation skills. And yeah, I’ve used the GPS from time to time to get positions, but a year later I feel better about it, I think because I know I’ve also been improving my general navigation skills at the same time. It’s augmenting what I was already doing but not replacing it, and I’ve never felt as if I’m relying on a GPS and that I’ll be trapped or in deep trouble if it suddenly switched off.
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  • Media Impressions of a Tararua Rescue

    Sunday (a week ago, 11th July) saw what was probably a routine rescue mission in the southern Tararuas. A man (31) and a woman (27) from Wellington were somewhere in the vicinity of Alpha Hut and unexpectedly walking through deep snow. The Sun began to set, and their GPS batteries died. It seems they were lucky to be in a place where their phone worked, because they texted their last known position to friends to say they were scared for their safety, and were heading for Alpha Hut. The weather was very clear and calm, not expected to deteriorate any time soon. A helicopter crew spotted their torch light at about 6.30pm on Sunday night, using night vision goggles, and collected them.

    In some ways this rescue wasn’t very interesting. It barely made the news at all. It was reported very briefly in the DomPost, not even giving an approximate location, but reporting the GPS failure. A press release from the Life Flight Trust (duplicated here) adds a few more details, but wasn’t picked up and analysed by any popular media outlets that I can find. Also being a press release from the helicopter operator, its main focus is that they rescued people with their helicopter rather than explaining why those people needed rescuing.
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  • My new GPS and digital red-lining

    I’ve spent the last few weeks playing with GPS receivers, initially with Craig‘s old one and very basic Garmin eTrex which he loaned me. (Thanks Craig!) A basic eTrex was certainly nothing flash at all. Having only a low-sensitivity antennae, it barely works when there’s a tree on the horizon let alone being under bush cover. This aside, it was great having something to play with to simply get an initial idea of all the basic GPS terms and ideas. A little over three weeks ago, I finally bought my own more sophisticated Garmin eTrex Vista HCx. This new extension to my tramping hobby has also manifested itself on this blog, which is why several of the trips now have Download GPX and Load map links. (The former downloads a GPs eXchange Format file, and the latter opens a Google Maps box with the described route overlaid.) I’m hoping to keep this up in the future, and I suppose time will tell how it works out.

    It’s been a surprisingly difficult decision for me to get a GPS receiver, and not strictly because of the cost. I’ve been putting it off because I’ve really wanted to get a good feeling of how to navigate without one, and I’ve not wanted to have the temptation lying around that would encourage bad habits of using a GPS without understanding the surrounding land. I definitely think that understanding maps, compasses and (sometimes) altimeters is the way to go, perhaps with a GPS to fall back on when things get unexpectedly bad or chaotic. I certainly don’t ever want to get myself into a situation where I go out relying primarily on an electronic device that runs on batteries. There’s a stigma in some tramping circles that’s attached to openly carrying a GPS receiver. To some extent I do even agree with the origins of this stigma, I think, though mostly because there do seem to be some people out there who really are relying primarily on a GPS to get them through a tricky situation without necessarily having the more fundamental navigation expertise and experience to back it up. I suspect it’s asking for trouble, which is why I’m hoping I don’t fall into the trap myself.
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