Author Topic: SAR  (Read 4171 times)

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Offline stillbear

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SAR
« on: June 27, 2010, 07:12:04 AM »
How do i go about getting started on search an rescue.We have a local fisherman that has
drowned an they cannot find him. I feel maybe i could be of some help since i have the equipment might aide in somewhat of a closure.  Thanks Gary


Offline sonar2000

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Re: SAR
« Reply #1 on: June 27, 2010, 10:36:21 AM »
Gary, contact the local law enforcement and let them know what you have.  Sonar for missing persons can be challenging and difficult, but it is patience and work to perform detailed scans of an area and not miss the target.  Make sure you overlape the scans (trail).
also unless you have a definite target, you may see the image only on a review using humviewer, or one of the other external viewers. It all depends on your bottom composition and what else is in the area.
Setting up the unit to make a good recording is important. You may run a scan, review and change a setting and then rerun.

Your unit is capable and should do the work.

Another thought is the size of the area. if it is quite large then side scan may be the option instead of side imaging. Send me details you get (off line) and I will help you more. 
Check my profile for a phone number if you want to talk.

Chuck
« Last Edit: June 27, 2010, 05:45:35 PM by sonar2000 »

Offline sonar2000

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Re: SAR
« Reply #2 on: June 29, 2010, 07:02:06 PM »
Gary, another thought is the patterns used.  we try to run straight lines (when possible) and then take another set of scans at 90 degree angle so that the patterns are very overlapped. when looking for a body (or other small item) it is important to capture the target with as much signal as possible.  A target scanned from head to toe will not produce as good as result as a target scanned head/toe at the same time.  Hope this creates a picture in your mind of this. 
let us know how all of this turns out.

Chuck

Offline stillbear

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Re: SAR
« Reply #3 on: June 29, 2010, 07:16:25 PM »
Chuck i think i understand what you are saying.I would like to get proficient enough to offer my services someday.Right now all i have is one 997 on the TM.  I am putting funds up to get a 1197 for my console then i will be ready.Thanks Gary

Offline sonar2000

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Re: SAR
« Reply #4 on: June 29, 2010, 07:20:27 PM »
Gary, the 997 will also do a great job on scan.  if you want to run on the TM and record then send me the recording(s) I will look at them for you. 
You might be their biggest help right now. 
Chuck

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Re: SAR
« Reply #5 on: June 29, 2010, 07:27:52 PM »
By the way they found the fisherman sat, 66 years old they think he fell out of the boat and drown.Dam the bad luck. There were a lot of SAR people there. Pana lake here in Central Ill.     Thanks   Gary

Offline sonar2000

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Re: SAR
« Reply #6 on: June 29, 2010, 07:32:56 PM »
Glad he was found.  Now the family can start the healing process. 

Too bad people wont wear their life jackets. We have had two drowning in the last three days and all because of failure to wear the PFD. 

thanks for the updates. 

Chuckj

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Re: SAR
« Reply #7 on: July 06, 2010, 01:06:43 PM »

Another thought is the size of the area. if it is quite large then side scan may be the option instead of side imaging.
Chuck

Can you explain further, Im confused by the terminology used.
Hate to see her go, but love to watch her leave.

Offline sonar2000

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Re: SAR
« Reply #8 on: July 06, 2010, 01:39:51 PM »
Side scan and side image are about the same except for the copyrights, function and operation.. 
In usage:
HB is fair out to about 150 feet side to side with the optiminal about 75 feet. 
If the area is quite large then a bigger side scan image with tow fish may be the tool.  600 meters or so of side to side. but then again the target may be only the small speck of yellow.
Depth plays into the image as well as the towfish.
all I was saying is that each unit has its best and its limits and the size of the area determines the one to use. 
Of course you use what you have. but in search management you utilize resources and not devices.   
small areas may be quite good for HB but deeper depths and large (square acres)  may be the best for the sidescan units.  MST and such.  It all depends on how quick you want to find the victim for the family.

this is a quicky answer where in our classes this is about a 3 hour subject.

chuck
« Last Edit: July 06, 2010, 01:43:20 PM by sonar2000 »

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Re: SAR
« Reply #9 on: July 06, 2010, 01:58:17 PM »
Thanks Chuck,

Can you give me some idea of the cost differences between an 1197 ($3k) and a side scan with tow fish unit?

Hate to see her go, but love to watch her leave.

Offline sonar2000

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Re: SAR
« Reply #10 on: July 06, 2010, 03:04:16 PM »
The true side scan units are in the range of $38,000.00. 

But you get what you pay for.  Sometime the small cost units do not meet the needs of the mission. Sometimes the cost of the more expensive units are beyond the needs of the mission.
As we teach in our SAR classes and SAR presentations. It is not what is in your tool box rather where can the tool for the occasion be found and made available.
What is the cost versus need to meet the mission objectives.

For small budget agencies it means knowing who has the tool that fits the need  and what is the repsonse time.

Chuck


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