Launch of The Newest GPS Satellite

Images from www.gpstracklog.com:

GPS IIF launch; image courtesy United Launch Alliance

 

DeLorme inReach Review

Check out my review of the DeLorme inReach two way satellite communicator at seattlebackpackersmagazine.com.

The DeLorme inReach is a two-way satellite communication transceiver with GPS capability. DeLorme has steadily updated the inReach product line over the last several years. The latest model is a robust device that outstrips many of the competitors’ products in terms of capability; specifically in the field communications options, social network messaging and position reporting is a big step beyond sending preloaded messages.

To read the rest of the post go here.

GPS Navigation Discussion

Recently a friend emailed me the following thread from a Search and Rescue forum.  The comments below are right on the mark and worth remembering.

"......In the case of a GPS, its' the person following the GPS and relying far too heavily on the technology and not common sense. ......

When I had my class in land navigation, my instructor told me that to accurately navigate one needs at least 2 out of the 3 tools: map, compass, and GPS. A map will give you a picture of what's happening. A compass will tell you what direction reality is. And a GPS will show you where to go. But in all cases, a liberal dose of brain matter must be applied.

The problem is not technology, it's the application of technology. People can be taught the most effective and safe way to apply technology, but there are times even that doesn't solve the problem. I guess what I'm saying is this is what they call "the human element", and with today's technology, there may not be an answer."

I really liked the comment:

            The problem is not technology, it's the application of technology.

Your Outdoor Plan

The following is a post from September 2011.  The information is worth repeating.

There are lots of articles and posts about letting the responsible person know about your travel plans. Should you not return home on time they are the trigger to begin the search process.

This may be the most comprehensive plan made yet!!!

After the loss of James Kim in the Oregon back country in 2006 I wrote a hiker's trip plan and posted it on my web site. I had input from several valued sources. I wanted something better for the wilderness traveler than a note to a neighbor. My intent was to provide the search responders something valuable to go by.

In far too many SAR missions, the reporting party has little information for the searchers to go on to begin their search.

My plan can be found here. It is a basic .pdf form.

Suggestions are certainly welcome.

Today, while reading a Linkedin email, I received a tip on what might be the most complete plan yet. It's from Paul Kirtley's blog. He is an experienced bush craft author in the UK. This plan is much like the hiker's flight plan. It includes a place for a picture of the hiker, data for one's route and much more.

Check out Paul Kirtley's plan here.

911 Call center

Still, that responsible person plays a huge role in contacting authorities to begin a search. My recommendation would be to pick a person that will make the 911 phone call without hesitation.

Travel safely.

Rechargeable Batteries for the GPS

I recently read a post of Rich Owings' blog (www.gpstracklog.com) about a new product from SANYO called the Eneloop.  I checked them out.


I have never been a fan of rechargeable batteries for my GPS receiver.  They just didn't work for me.

So far these batteries are working just fine.   I have them in my GPS receiver and small radio that I use nightly.

Here are the stats on these batteries:

1.  The unit can be charged 1,500 times; an increase of 30%
2. They hold there charge for a long time.  The claim is made that the battery will retain 75% of its charge after three years.
3. The cost is roughly 4 per charge.

I found the batteries at COSTCO in a pack of several AA & AAA batteries, charger and adapters for size C batteries.  The price was $29 for the pack.

For more information on the Eeneloop visit SANYO's site here.

To read Rich Owings' post go here.

GPS Error part II

There are a few other techniques that I use to get ready to navigate with my GPS receiver.

While driving to camp, turn on the receiver and place it on the dashboard. If the GPS hasn't been used for several months or if the user has traveled a great distance since last use the unit needs to initialize and update satellite data received from the GPS constellation. If that is not possible, allow the receiver to process satellite data for 10-15 minutes in an area where the sky view is open and not blocked by terrain or forest canopy.

Second, give your receiver the time to do it's job, especially with older receivers. For example, with an older GPS (my 10 year old Garmin 12CX) before marking a waypoint I will ensure that at least 4 satellites are being tracked and that the horizon isn't completely obstructed by canopy. While my friends might have been able to mark waypoints considerably faster, I am going to give mine the time to accomplish the task. I will evaluate the estimated position error and if the value is getting smaller I will just wait until it steadies up.

Third, I tend to navigate through the backcountry with my GPS powered up, all day, during a day hike. This allows me to record a track and keeps my position data current. Should I be hiking the length of the Pacific Crest Trail battery consumption would be a concern. That said for my long day jaunts battery conservation isn't really an issue to me.

Older models and those without an electronic compass require motion to develop heading and bearing data.  For example, when returning to a waypoint/destination, take a few steps and observe the display changes and adjust as necessary.  Once the GPS has settled on the correct bearing to the waypoint use your compass to back up your navigation.

Remember to calibrate the electronic compass each time batteries are replaced.

Boston Bombers Tracked by GPS

Rich Owings from gpstracklog.com has an interesting post on how the Boston police tracked and located the bombers.

Remember the Mercedes that the Boston Marathon bombers carjacked? Turns out that the police tracked it using GPS after the carjacking victim managed to escape and alert authorities.

To read the rest of the post go here.