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Important information about using the SPOT

Joined
Nov 21, 2008
Messages
7,966
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228
Location
Valley Mills (Just north of Wacko)
First Name
Bob
Last Name
Squires
Spot On

As some may be aware (if not, review trip report at www.BeemerBob.com), I had used my SPOT tracking device to summon for emergency help. It took longer than I would have expected to be located. After some research, I felt it was important to pass some of this information along.

Granted I was in a remote area, but I was in the United States (New Mexico, about 35 miles north of Grants). I was not down in some ditch or on a goat path in the middle of a forest. It took a over 19 hours for me to be located. I had only injured ribs so my situation was not life treating, so I am addressing this more from a “what if” type scenario. What if I had been bleeding or needed immediate medical attention? If that had been the situation, I fear that I may not have been here to write this.

What lessons can be learned from my experience that may minimize the risk for a life threatening emergency in a remote area. Did the SPOT fail or is the SPOT of minimal use. Are the risks of solo riding in remote areas greater then we may have thought?

In my case, the SPOT did not fail and did what it was supposed to do. The delay was caused by some other circumstances that we all need to be aware of before we head out on our next adventure. The SPOT, as stated, did what it was supposed to do, but yet if you are depending of the SPOT for your rescue, you may be disappointed (or dead). I strongly recommend that everyone that travels should carry a SPOT with them. It is extremely useful, but not a magic button and don’t let it lull you into a false sense of security

For some background, SPOT rescue operations are handled by a company called GEOS International Emergency Response Center (IERC). If the 911/SOS button is pressed, The SPOT folks do not even see it, that message goes directly to IERC. IERC’s job is to contact the appropriate officials and coordinate the rescue operation. After I returned home, I was able to talk with the IERC person that handled my case.

I will now attempt to describe some of the other circumstances.

Accuracy of the Spot?
In my situation, the coordinates that my SPOT had transmitted were: 35.55553, -107.50142. If you take those cords and input them to Google Maps. Switch to satellite imagery and zoom in, you will see the road CR-19 with the map marker right by the beginning of a ravine. It was surprising how accurate that was. That is exactly where I was. I recognize that ravine and I spent a considerable time laying/sitting right next to it. So what was the cause of the delay? Why the difficulty in finding me if the SPOT location is accurate? Some of the contributing factors follow.​

Acceptance of responsibility / jurisdiction and inadequately trained personnel.
There was some dispute between counties as to whose jurisdiction I was in and who had to fool with me or was I on Indian Reservation Land and it was their problem. The first dispatch office contacted did not even know how to input GPS coordinates into Google Maps. One county agreed to send someone out to search for me. He (or they) returned later that afternoon and reported that I was not at that location. IERC informed them that I was still sending help messages from the same location, so they therefore did not go to the right location. IERC gave them not only GPS coordinates but road intersection information. On CR-19 south of Indian Route 728 and persuaded them to go try again. They claimed they went out again, but returned with the same report that I was not at that location. Oh by the way. On the second or third attempt the sheriff deputy reported that they brought a small hand held GPS. What! You mean they had been attempting to find my GPS coordinates without a GPS! Isn’t that scary? And they reported that I was not at that location. How would they know?

By morning IERC had lost faith in the local sheriff’s office and elevated my recovery to the New Mexico State Police.

Around mid morning, the state police dispatched a helicopter assuming that I must be someplace where I could not be seen from the ground. The helicopter went to the GPS coordinates provided and guess what? There I was. He marked my location by circling above (I wish I had gotten a picture, it was cool). Then came a state cruiser followed by an entourage (the Calvary). Some folks loaded my bike in their truck and I rode back in with the trouper (do they call them troupers in NM?). Anyway, it was interesting that the trouper did not have a working GPS and was only using Google maps he had printed out.

Two lessons to take away from this.

1. Just because we may carry a SPOT and modern GPS equipment does not mean that those we would rely on for our recovery do. In some smaller counties, the cost of a GPS may not be in their budget. If they do have a GPS it may be a cheap old unit.
2. What importance do local authorities pay to some outside person crazy enough to ride/hike, etc. in remote areas? I’m not a local; I don’t vote or contribute to this locality. How do they feel about an outsider drawing on what may be very limited resources? I’m not saying that such a felling is right, but I do understand it and suspect that could have played a role.​
Not all GPS coordinates are created equal.

A GPS coordinate is a GPS coordinate, right? Not so! This I just recently became aware of and this issue may have played a very significant part in the delay. My understanding is very limited so I may misstate some details, but let me attempt to explain. First off there is this thing called a GPS datum. A GPS datum is a set of reference points on the Earth's surface against which position measurements are made, one could think of the datum as a map set. If two GPS systems are utilizing different datum (map set), they may represent the same location differently. Unless your GPS is very old this should not make a significant difference, but it would be a little off. The most common datum in use currently is something called WGS84. That is the datum SPOT uses, so if your GPS is not set to use WGS84 datum, you may be off a little bit.

A more significant difference is the coordinate format. Is your device using decimal format or the degree, minutes, seconds format or do you even know? I didn’t.

The Spot tracker gives the numbers in degrees and decimal portions of degrees, while your GPS may be in a format reads degrees, minutes, and decimal portions of minutes. There are 60 minutes in a degree, so if your GPS were to read 35' 30" (35 degrees and 30 minutes), on a reading from the Spot it would show up as 35.5000 degrees. And the difference can be significant. Were those looking for me aware of the difference? I doubt it. I had never thought about it. If I were to enter my location into something that was expecting degree format my coordinates would have been accepted as 35 55.553, -107 50.142 and that location would have been about 50 miles from my actual location of 35.55553, -107.50142.

I have a Garmin Zumo and by default it was set for coordinates to be in degree, minute, seconds format and not decimal format. Somewhere deep in you GPS settings, you have the option to set format and datum. It is very important that you change your setting to be WGS84 datum and decimal format. You may need to find someone and you need to be singing from the same song sheet.

Based on my event, there was a post made on ADV rider that you change your non-emergency SPOT help message to read something like:
“'This is a HELP message. It is not serious. My location is shown in decimal degrees WGS84 datum. Set GPS same.' As far as the emergency button, you don’t have any control of the message, you just hope that the receiving officials have better training then the ones in McKinley County, New Mexico.​

Other suggestions for your SPOT device.
For non-emergency button you have the ability to specify the receivers of the message, so make sure there are folks on your receiver list that are familiar with websites such as ADV rider or Two Wheeled Texas. With the failure of the local first responders, I was also periodically sending my custom non-emergency help buttons. I also had it set up to post that entry to my blog as well as folks on my receiver list. This caused folks to make posts to TWT and ADV with my brother, Hap, posting updated information he had from IERC. Before the day was out, about 400 fellow riders where monitoring the progress and these in the area were preparing load up and come find me. It was two riders out of Albuquerque that loaded up and came to search for me. The “brotherhood” of fellow riders is awesome. While the state helicopter did find me, I now have far more faith in fellow riders coming to assist then I do local authorities. The only delay in them not coming the previous day was that they were under the impression that local authorities had already been dispatched and surely they could find me because they had my exact GPS coordinates. 

Also be aware that while the SPOT did allow me to send a non-emergency message, all other messages are ignored if there is an active 911 call. I had attempted to send a signal for roadside assistance. Frankly at that point, it would have been just fine to ride out with a tow truck, pack mule – ANYTHING. My roadside assistance call was ignored because I still had an active 911. I had thought that if I simply turned the SPOT device off and then turn it back on again, that would cancel the 911 call. Not so. The only way that a 911 call can be canceled is to hold the 911 button down for 10 seconds until it starts to blink red. Then it takes up to 15 minutes for satellites to be acquired before the message is send. The 911 call has not been canceled until the red light stops blinking. At that point, you can do other tasks such as signal for roadside assistance.​
I guess I am now an expert on SPOT, so if anyone has any questions, please feel free to contact me.
 
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Another note. If you tried calling in the roadside assistance on the help message they wanted your policy number or contract number. Might help to give that info to the people who follow you as well.

And thanks for sharing this and your adventure.
 
Great info. I'm a little flabbergasted that the first responders A. Couldn't find you with GPS coordinates AND a nearby intersection, B. Reported that you weren't there, and C. Still couldn't find you even when they finally procured a GPS of their own. This doesn't bode well if you were bleeding in a ditch like you said. Not to mention the difference between degrees/minutes/seconds and decimal degrees should not be a mystery to these people. Wow.

So, are you going to get a lighter bike? :trust: ;-)
 
Frankly, I think your mistake was bringing the government into it by pressing 911 :-P It's sad to say, but better qualified civilians delayed action because they were afraid of getting in the local authorities' way... I believe that if it were left up to TWT and/or Advrider members, without the confusion of the 911 call, you probably would have been reached in 1/2 the time.
 
Another note. If you tried calling in the roadside assistance on the help message they wanted your policy number or contract number. Might help to give that info to the people who follow you as well.

Very good point. I had provided my Spot ESN# which for a Spot user is the contract number but one has to tell them I am a Spot customer.

The SPOT has very limited text for this message. I'm not sure how one would get all that info and the proper GPS format information into 110 characters.

Umm .. any ideas out there?

Perhaps before you leave you post all this info to a blog or some other web site and make reference to in with your spot message SPOT message?
 
Frankly, I think your mistake was bringing the government into it by pressing 911 :-P It's sad to say, but better qualified civilians delayed action because they were afraid of getting in the local authorities' way... I believe that if it were left up to TWT and/or Advrider members, without the confusion of the 911 call, you probably would have been reached in 1/2 the time.

That is sad. But I beleive that you are right on. I have FAR more confidence in my fellow riders.
 
That's very helpful info, thanks! Sorry you had to find out the hard way and glad it wasn't worse.
 
Moral of the story: Don't take SPOT, take Lassie. She got help for Timmy within 30 minutes every time.
 
Having worked with GPS actively for 'bout 17 years, here are a few observations:

1. If you have "moved" the GPS device more than 'bout 60 or so miles since it last acquired a position fix, it can take 15 minutes or more to "acquire" a fix. The "technobable" is that there is a "projected" startup point, based upon the last known position. If you've moved too far, it effectively requires a "cold boot" or to start from scratch.

2. Also in the "technobable" there is an Almanac file that keeps track of the satellites relative position to each other. If your GPS device has been turned off for an extended period, you will need to download a new almanac file from the GPS satellites in view. This too can take some extra time.

3. GPS accuracy, without differential correction, now that Selective Availability has been turned off, is nominally 100 Ft. If you have WAAS (wide area augmentation system) differential you can see accuracy of nominally 21 ft. Other forms of differential can get the accuracy down to sub-meter in real time, or sub-inch in post processing. Most Garmin units, that I've seen, can use WAAS differential, you'll be "happier" with it turned on.

4. As Bob stated, there are different Datums out there but WGS84 (World Geological Survey 1984) is the defacto "standard" for most "modern" GPS units.

5. There are 6 orbital planes with 4 satellites each for a total of 36 in the GPS constellation. Each satellite orbits the earth in roughly 11 hours. During this time the earth is rotating beneath the satellites. For GPS to work, you need 3 satellites in view to achieve a 2D (two dimensional / Lat Lon) solution or 4 for a 3D (lat lon Elevation) solution. Elevation is inherently the least accurate of the measurements (and is not trusted for aviation use).

6. In the northern hemisphere, there is an area of the northern sky that, from your perspective on the surface of the earth, that GPS satellites never get in. The farther north you go, the bigger it gets, until when you get to the north pole there is a "hole" above you that the GPS satellites never enter. The same is true of the south pole. And when you're at the equator, you can take a small "divot" out of north and south horizons, and imagine an hourglass on it's side. SO, if your GPS antenna isn't horizontal, and is somewhat pointed north (in the northern hemisphere) you will effectively "mask" satellites.

7. GPS works on a very simple principle: Rate multiplied by Time equals Distance. And for this equation, Rate is a constant (roughly the speed of light), so the variable is TIME. Time is encoded into the GPS signals so that your GPS receiver can then compute the DISTANCE. Do this from each of 4 satellites and where the lines intersect is your position. BUT as the lines (radio signals) get refracted by the earth's atmosphere there is an induced error to the time, and corresponding position.

8. Two time periods per year, from your perspective on the surface of the earth, GPS "gets goofy" and does not give "good position fixes". The longest this can last is roughly 20 minutes. Again with the technobable, from your perspective the satellites get "bunched up" in one area of the sky. When this happens, the Dilution of Precision or DOP goes to a high value. Anything above 6 is undesirable. This area actually never disappears, it always exists, but from your perspective it moves from south to north and rotates around the earth as it spins below.

9. All GPS receivers are NOT created equal. Most consumer GPS units update their positions one time per second. Some of the specialty units I play with update 20 times per second, are differentially corrected and provide sub-meter accuracy in real time.

10. GPS is "connect the dots", it gives a "snapshot" of where you WERE (unless you are stationary). A motor vehicle traveling at 70 mph travels roughly 102 2/3 feet per second, so you've covered quite a bit of real estate in a fraction of a second... Some small aircraft travel at 145 mph or 210 2/3 feet per second, and a commercial airliner traveling at 400 mph travels 586 2/3 feet per second, hence the need for more "dots"...

------------------------

SPOT's are great tools. I've handed my Spot one down to my 80 year old parents and they use it when traveling so that I & my siblings can keep an eye on 'em. I'm using an SPOT two now when traveling by bike, cage or air. My family & I enjoy the ability to "check up" on each other. While I hope I'm never in a situation like Bob was, since the SPOT is satellite based, it'll work in many areas where a cell phone wont. That was the "tipping point" for me in deciding to get 'em.

Respectfully
John
 
Just an FYI... Personal Locator Beacon ... is what I would take if riding a remote area or alone on an adventure tour. I never venture out on the boat without one (actually two, on on the boat, one in the ditch-bag), and this said, if you are truly in a "bad situation", you will get immediate assistance when this is activated. The SPOT is good for two things; 1) let's friends/family follow your travels & 2) the SOS feature is better than nothing, but it does not send the signal to the authorities who are tasked with immediate response of a life or death situation. Personally, the $500 of the right equipment is cheap compared to the option of bleading out in a ditch as described.

As many have said... you get what you pay for. BTW, I do not recommend "testing" it see what happens as the fines for a false alarm are hefty.
(edit: Meant to add this link: http://www.sarsat.noaa.gov/emerbcns.html )

and a great place to acquire one:
http://www.jamestowndistributors.co...rsonal Alarms&category=680&refine=1&page=GRID
 
Great post Bob; very informative. Thanks for sharing your experience. What generation SPOT were you using and what model Zumo do you have. I can't find any any option for selecting the type of coordinates on my 550.

Just an FYI... Personal Locator Beacon ...[/url] )

What would have been different? The locals responsible for the area would have had the same poor response to the dispatch. They just were not geared up for this type of search and rescue. Some back country areas (Colorado, Utah, CA) have very experienced and well equipped wilderness rescue organizations that would have found Bob with the hour had he been in their areas. Once IERC recognized that the locals were clueless they called in the state; Bob was found and extricated.

I think the SPOT is a valuable tool that used in conjunction with the resources of the motorcycle community can get the job done. Much better than nothing anyway. And, if you are hurt really bad, you may not be able to activate the thing anyway. That would end badly but those watching your tracks will see were you are and arrange for recovery. So, best to not go solo.

Ecclesiastes 4:12 Though one may be overpowered, two can defend themselves. A cord of three strands is not quickly broken.
 
I guess the 2 things I take away from this whole ordeal and SPOT are:

1) SPOT does not contact the local authorities. It contracts someone else to do that based on the information gathered from the SPOT. This is much like having Ranger American monitor your home alarm. It's definitely not the best scenario but as was said before, in most cases it would be better than nothing.

2) IF I ever go on a mis-adventure and have a SPOT, someone will be tasked with monitoring my movements and messages during the day when I plan on being on the move. I'll rely on that person more than I'll rely on 911 response.

It would be nice if there was some sort of nationwide website where folks could post their location and sevices they can provide so anyone traveling could print out the information for the areas they'll be traveling.

Great bit of info, Bob. I too nominate it for a sticky. :thumb:
 
It would be nice if there was some sort of nationwide website where folks could post their location and sevices they can provide so anyone traveling could print out the information for the areas they'll be traveling.

There is or was somewhere, I signed up at the ROT Rally, lot of good it does me....I haven't the foggiest what the name was.
 
Great post Bob; very informative. Thanks for sharing your experience. What generation SPOT were you using and what model Zumo do you have. I can't find any any option for selecting the type of coordinates on my 550.



What would have been different? The locals responsible for the area would have had the same poor response to the dispatch. They just were not geared up for this type of search and rescue. Some back country areas (Colorado, Utah, CA) have very experienced and well equipped wilderness rescue organizations that would have found Bob with the hour had he been in their areas. Once IERC recognized that the locals were clueless they called in the state; Bob was found and extricated.

I think the SPOT is a valuable tool that used in conjunction with the resources of the motorcycle community can get the job done. Much better than nothing anyway. And, if you are hurt really bad, you may not be able to activate the thing anyway. That would end badly but those watching your tracks will see were you are and arrange for recovery. So, best to not go solo.

Ecclesiastes 4:12 Though one may be overpowered, two can defend themselves. A cord of three strands is not quickly broken.

The difference is who gets the signal and who is responsible to respond. The Air Force Rescue Coordination Center is charged with land-based emergency signals, usually dispatching volunteer members from The United States Air Force Auxiliary Civil Air Patrol; ie: Federal Response as opposed to local response (although based on Katrina, maybe the locals would be better). Put it simply, an PLB / EPIRB, etc gets SERIOUS attention when activated. But as mentioned, SPOT is better than nothing.
 
1) SPOT does not contact the local authorities. It contracts someone else to do that based on the information gathered from the SPOT. This is much like having Ranger American monitor your home alarm. It's definitely not the best scenario but as was said before, in most cases it would be better than nothing

Not sure I agree. I feel the IERC folks did a great job of staying on top of things and escalated it when they became aware that local authorities were incompetent. If the message had gone directly to authorities, it may have been pigeon holed. I like the idea of a third party charged with staying on top of things and monitoring the activities of first responders.

Although during the middle of the night, I had planned to send the unit back to the folks at Spot accompanied with a jar of Vaseline. I am now better informed as to where the problem resided.

But that’s just my take.
 
What generation SPOT were you using and what model Zumo do you have. I can't find any any option for selecting the type of coordinates on my 550.

I have a 660 and version 2 spot. follow your "where to" until you find the option to enter cordinates. There you should be to change the settings.
 
Having worked with GPS actively for 'bout 17 years, here are a few observations:

1. If you have "moved" the GPS device more than 'bout 60 or so miles since it last acquired a position fix, it can take 15 minutes or more to "acquire" a fix. The "technobable" is that there is a "projected" startup point, based upon the last known position. If you've moved too far, it effectively requires a "cold boot" or to start from scratch.

2. Also in the "technobable" there is an Almanac file that keeps track of the satellites relative position to each other. If your GPS device has been turned off for an extended period, you will need to download a new almanac file from the GPS satellites in view. This too can take some extra time.

3. GPS accuracy, without differential correction, now that Selective Availability has been turned off, is nominally 100 Ft. If you have WAAS (wide area augmentation system) differential you can see accuracy of nominally 21 ft. Other forms of differential can get the accuracy down to sub-meter in real time, or sub-inch in post processing. Most Garmin units, that I've seen, can use WAAS differential, you'll be "happier" with it turned on.

4. As Bob stated, there are different Datums out there but WGS84 (World Geological Survey 1984) is the defacto "standard" for most "modern" GPS units.

5. There are 6 orbital planes with 4 satellites each for a total of 36 in the GPS constellation. Each satellite orbits the earth in roughly 11 hours. During this time the earth is rotating beneath the satellites. For GPS to work, you need 3 satellites in view to achieve a 2D (two dimensional / Lat Lon) solution or 4 for a 3D (lat lon Elevation) solution. Elevation is inherently the least accurate of the measurements (and is not trusted for aviation use).

6. In the northern hemisphere, there is an area of the northern sky that, from your perspective on the surface of the earth, that GPS satellites never get in. The farther north you go, the bigger it gets, until when you get to the north pole there is a "hole" above you that the GPS satellites never enter. The same is true of the south pole. And when you're at the equator, you can take a small "divot" out of north and south horizons, and imagine an hourglass on it's side. SO, if your GPS antenna isn't horizontal, and is somewhat pointed north (in the northern hemisphere) you will effectively "mask" satellites.

7. GPS works on a very simple principle: Rate multiplied by Time equals Distance. And for this equation, Rate is a constant (roughly the speed of light), so the variable is TIME. Time is encoded into the GPS signals so that your GPS receiver can then compute the DISTANCE. Do this from each of 4 satellites and where the lines intersect is your position. BUT as the lines (radio signals) get refracted by the earth's atmosphere there is an induced error to the time, and corresponding position.

8. Two time periods per year, from your perspective on the surface of the earth, GPS "gets goofy" and does not give "good position fixes". The longest this can last is roughly 20 minutes. Again with the technobable, from your perspective the satellites get "bunched up" in one area of the sky. When this happens, the Dilution of Precision or DOP goes to a high value. Anything above 6 is undesirable. This area actually never disappears, it always exists, but from your perspective it moves from south to north and rotates around the earth as it spins below.

9. All GPS receivers are NOT created equal. Most consumer GPS units update their positions one time per second. Some of the specialty units I play with update 20 times per second, are differentially corrected and provide sub-meter accuracy in real time.

10. GPS is "connect the dots", it gives a "snapshot" of where you WERE (unless you are stationary). A motor vehicle traveling at 70 mph travels roughly 102 2/3 feet per second, so you've covered quite a bit of real estate in a fraction of a second... Some small aircraft travel at 145 mph or 210 2/3 feet per second, and a commercial airliner traveling at 400 mph travels 586 2/3 feet per second, hence the need for more "dots"...

------------------------

SPOT's are great tools. I've handed my Spot one down to my 80 year old parents and they use it when traveling so that I & my siblings can keep an eye on 'em. I'm using an SPOT two now when traveling by bike, cage or air. My family & I enjoy the ability to "check up" on each other. While I hope I'm never in a situation like Bob was, since the SPOT is satellite based, it'll work in many areas where a cell phone wont. That was the "tipping point" for me in deciding to get 'em.

Respectfully
John

How does all of this change the fact that once somebody who actually knew how to use a GPS got his coordinates, they flew right to him?

Regarding GotDurt's suggestion, maybe it's time for an ADV/Local MC group crowdsourcing 1st responder capability? :-P
 
I have a 660 and version 2 spot. follow your "where to" until you find the option to enter cordinates. There you should be to change the settings.

I did not have WGS84 as an option on my 550. So I just left in Long/Lat coordinates. I'm figuring that's the most commonly understood. And can be used with a USGS map just not to within 100 feet.
 
I think Bob's experience is out of the ordinary. I've heard of several rescue stories, granted they were from the SPOT website, were the signal was passed on to local rescue folks who arrived within the hour. Bob just happened to be in a county that was operating in the 1950's as far as rescue technology. Point being that once the locals were skipped and the state troopers got the call they were there shortly. Would have been better if he hadn't had to spend the night though.
 
Maybe the locals will take the opportunity to upgrade their equipment and protocols. Even locally, the response you get will depend on the jurisdiction and how well funded and trained they are. The responders are no less willing, but most rural departments are selling cookies to fund equipment and personnel who are mostly volunteer. Just saying.
 
I did not have WGS84 as an option on my 550. So I just left in Long/Lat coordinates. I'm figuring that's the most commonly understood. And can be used with a USGS map just not to within 100 feet.



Something as new as a 550 MUST have WGS84 as an option. It's the most commonly used datum out there. You just haven't looked in the right place. Go into utilities, find maps, find "datum(s)" and you can switch it.

It still uses latitude/longitude coords but they are skewed differently.

I made the switch to the decimal format for entering coords after a few years of using GPS because it is SOOO much easier than any other format to type in.
 
Go into utilities, find maps, find "datum(s)" and you can switch it.

It still uses latitude/longitude coords but they are skewed differently.


That is how you would do it on the GPS. On the computer it would probably be edit, preferences, then position. The position and datum may both be chageable at that point. The decimal LAt/Lon format would be "Hddd.ddddd" for degrees and fractions of degrees. The other Lat/Lon options would include minutes and seconds before going to decimals fractions. Much more confusing. ;-)
 
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