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Entries by Jeff Lehman (172)

Tuesday
Jun072016

Heart Bar Cleanup June 2016

Thanks to those SAR members who donated their time to keep the Heart Bar training facility looking sharp. Thanks to Shannon Kovich for submitting this video.

HeartBar Cleanup 2016 from SBSAR on Vimeo.

Sunday
Apr242016

Rope Rescue Operator Class Graduates 14

SAR members representing West Valley SAR, Cave and Technical Rescue Team, San Gorgonio SAR, SB Mountain SAR, Morongo Basin SAR, and Wrightwood SAR completed the 2016 Rope Rescue Operators Course. Congratulations to the 14 rescuers as they continue to expand their responsibilities and continue to serve the citizens of San Bernardino County and the state.

Wednesday
Mar022016

Is GoTenna Ready for SAR?

After many months of waiting, I was finally able to get my hands on a pair of GoTenna devices to field test. These devices are VHF radio transceivers that pair via Bluetooth that enable two phones to pass text messages without requiring any cell service. The required phone app allows for text messages, pinging connectivity between devices, and the swapping of location using the phone's onboard GPS to fix position. There are also downloadable base maps to display position data.

 The pairing process was quick and easy with the Android phones used in the test, and the software and hardware performed without any difficulty. The interface is similar to most of the available messaging apps. Although, only text can be sent, so there is no photo sharing or other file sending available. 

While testing one person attached the device to his pack according to the suggestion of the manufacturer, and the other person placed it in his pocket and started off on his mountain bike. We communicated via 5 W VHF radios with rubber duck antennas to compare the coverage. Obviously, as long as the GoTenna was in the bike rider's pocket, the connection was severly compromised. Periodically the rider would stop, remove the device, and attempt to communicate. This was done until we could no longer maintain a reliable connection. As expected, the most reliable communication came with optimized antenna location. If both ends of the communication held their devices high, and vertically polarized, the likelihood of a reliable connection increased. 

In the environment tested (shown on the map to the right) the furthest that we could maintain a connection was approximately 0.6 mi. This was challenging RF terrain, however. The blue shading on the map is a line of site layer, so we were able to maintain some modicum of communication outside of this region. By comparison, the 5W VHF radio allowed reliable communication greater than 1 mile in this same terrain.

We were operating in the MURS band with the voice radios. A bit of testing shows that the GoTenna may be operating on MURS channel 1 (151.82 MHz), so we avoided this channel, and used MURS channel 5 (154.60). We noticed that if you were transmitting with the 5W radio on channel 5, it would interfere with the GoTenna messages. This may be something to consider since much of our SAR work is in the neighborhood of this portion of the spectrum. 

Given the additional overhead of having to pair a smartphone to the device, and the limited range, the GoTenna doesn't seem to provide any significant communications advantage over, or in addition to, the typical portable radio. Still, this is the first generation of such a device, and for those of us who are attracted to all things RF, it is most intriguing.

Tuesday
Mar012016

Rope Rescue Operator Class (Formerly TRBC)

The Rope Rescue Operators Course (formerly the Technical Rescue Basics Course) begins April 8. To sign up contact Volunteer Forces at 909-387-0641. Check out the flyer for details.
Thursday
Feb042016

Black Diamond Recalling Quickdraws and Carabiners

Check out this link to see if any of your gear is on the list.

http://warranty.bdel.com/CarabinerRecall/Landing

Sunday
Dec132015

'Twas the Night Before a SAR Christmas

Twas the night before Christmas and twenty below, The forecast was calling for 3 feet of snow.
We had all snuggled in to our beds for the night Knowing Santa would leave gifts that we’d find at first light.
We snored and we dreamed until two forty-five That was the time that the phones came alive.
Are you available for a search the caller did ask If so please hurry, we’ll give you a task.

A small child is missing was all we were told It’s unlikely she’ll survive alone in the cold.
The searchers got ready, all grabbing their packs Filled with spare clothes ,water and snacks.
They made their way to the point last seen In hope of finding clues of where the subject had been.
The command post was on-site and search managers too They planned and they mapped, they knew what to do.

Hasty teams were sent to all known walking trails, Search dogs were requested in case all else fails.
The trackers were out, looking for sign With a bit of good luck the child they would find.
The CP had a copy of the Lost Person Behaviour book That told how far she may have traveled and the best places to look.

More searchers were called from a neighboring team With the extra eyes the subject was sure to be seen.
A call came in that some tracks had been found Do we follow the prints or call for a hound?
At last we now have a direction of travel This piece of the puzzle we now can un-ravel.

Teams were re-directed to do some jump tracking We were getting close, we’d better get cracking.
The searchers were now moving at the speed of light They’d bring the wee one home and out of the night.
In the beam of their headlamps they couldn’t see far But there was an old cabin and its door was ajar.
Inside they found her curled up in a ball To the command post they relayed the most wonderful call.
We have her they said, she’s alive and well The news brought the parents back from that living hell.

We’ll stretcher her out the searchers did say Send another team to help light the way.
Have EMS waiting to make sure she’s all right And we’ll have her home before morning light.
The teams had accomplished what they set out to do Located the subject and brought her home too.
No greater gift could have been given that day Then to get back a child that had gone astray.
The searchers had left their homes in the night To help a fellow man and do what was right.
Once at home on that Christmas morn Loved ones were hugged and good will was born.

To receive is nice but it’s better to give, These things we do “so that others may live”.

---Submitted by Pearl Heft. Author Unknown

Sunday
Nov292015

December BMC Field Session Cancelled

The BMC field date scheduled for December has been cancelled due to lack of snow. Hence the first field date now will be January 9, 10. A second field date of February 20, 21 has been set. Please email Sonny Lawrence at his SBSAR address to reserve a spot on one of those dates.

Thursday
Sep172015

Personal Vertical Skills

Wednesday
Sep092015

BSAR Graduates Ready to Serve

Another Basic Search and Rescue academy class is ready to use their valuable time to serve the citizens of San Bernardino County, and the region. A special thanks to all BSAR instructors who make this possible.

 

Wednesday
Sep092015

Women Warriors Fitness Event