Author Topic: Anyone else think this is a gun? (Read 10999 times)

doo600 · « **on:** April 07, 2010, 04:59:20 PM »

Hi guys, just joined and very happy to find a Search and Rescue area for Side Imaging. Just got our new 2010 Search and Rescue boat and I was able to get a 1197SI mounted onboard. I'm ecstatic. We took it out for it's first run and came up with this. Any ideas? Sure looks like a gun to me.

sonar2000 · « **Reply #1 on:** April 07, 2010, 05:09:08 PM »

yep kind of does.
Have you installed humviewer or yellowfin on your computer? you can measure things with the external programs?

Did you mark the spot with gps?

Did you record the run for playback so you can relocate?

Ddivers should be able to find it in 4 feet.

If you recorded the run try sending it to my e-mail. large file can be sent via www.bigfiles.com.

I would like to see the recording if possible.
Chuck

RGecy · « **Reply #2 on:** April 07, 2010, 05:15:53 PM »

doo600,

Welcome to the forum. Glad to see more SAR guys joining. This is exactly the kind of stuff we need on here.

That is a very interesting target. But to me the shadow on it though does not look like a gun. Most of the time the shadow on an object like this will give more detail than the hard return. In MOST cases! The hard return certainly has the shape of a hand gun though!

Have you tried to measure the object in HumViewer or YellowFin?

I certainly would not discount it as a viable target, but my money would be that its not a gun.

Now, if you don't go dive it we will never know what exactly it is and will never have anything to compare this image to. So get back out there and pull it up!

Good Luck,

Robert

Jolly Roger · « **Reply #3 on:** April 07, 2010, 05:21:37 PM »

Doo600,
welcome on board!

Sure looks like a gun, but I would like to see the original picture without the zoom. Can you post that as well?

77 feet distance? Hm, it's gotta be a big gun then

.

Regards / Harry

doo600 · « **Reply #4 on:** April 07, 2010, 05:39:58 PM »

Thanks for the warm welcome. We plan on going back out and putting someone in the water. No divers had gear with us and you can tell the water was not warm. This was actually done by one of my trainees later in the day after I left. He did mark the spot so we can return. As far as recording I am not sure how to do that yet.

I don't know what humviewer and yellowfin are but I'm sure I'm gonna be installing it tomorrow.

sonar2000 · « **Reply #5 on:** April 07, 2010, 05:47:46 PM »

HV and YF are external viewing programs. Makes it easier to view recordings. The 1197 book tells you how to make recordings. Just remember to be in advanced mode. and to have a SD card in the slot.

Try to keep your recordings to 10 minutes and no more than 15. this will help in transfering the sd info to the computer and to help the viewing programs run smoother. and not slow.

Also make sure your computer had a good bit of main memory. 2 gig would be really great. It will run in less but slower to page the segmented files.

Let us know the divers find.

Also some more pictures before the diver gets in. chuck

Jolly Roger · « **Reply #6 on:** April 07, 2010, 05:58:08 PM »

Doo,

you can do recordings with your 1197, but you have to choose "advanced" in the user mode in the set up tab.

Then you can see the "recording/ snapshot" view.
Go to that view and press the menu button once and scroll down to "start recording". use the right cursor button to start the recording. After starting the recording you can back to whatever view you like.
to stop the recording you hit the menu button once again and scroll down to "stop recording".

The recording will be saved on your SD card automatically as well as your snapshots.

You can download the recordings from your SD card to your PC.

HumViewer and YellowFin can be downloaded in the download section here on the forum. Here's the link for HumViewer:

http://forums.sideimagingsoft.com/index.php?topic=778.0

George wrote an excellent tutorial about how to set up HumViewer here:

http://forums.sideimagingsoft.com/index.php?topic=638.0

Just follow the instructions and you'll be good to go.

Here's the download link for YellowFin:

http://forums.sideimagingsoft.com/index.php?topic=53.0

I highly recommend reviewing your recordings on your PC. You'll be amazed what you see when looking at them on the big screen of you PC.

Regards / Harry

doo600 · « **Reply #7 on:** April 07, 2010, 06:08:04 PM »

Excellent, thanks. Checked out humviewer and yes, I definitely need that. Unfortunately my home computer is 64 bit so gotta wait til I get to my office tomorrow to play with it. Thanks guys.

sonar2000 · « **Reply #8 on:** April 07, 2010, 06:09:36 PM »

64 bit is fine. chuck

mendota · « **Reply #9 on:** April 07, 2010, 08:33:18 PM »

Almost no chance this is a gun, unless you mean cannon. Wayyy too big a return.

Remember, the SI beam is around 4" wide, which limits the resolution to about that much. (in the direction of boat travel)

Therefore, for a handgun I would expect nothing more than a bright spot against a dull background, although it is possible it might have an elongated or right-angle shape.

And, it would be really tough to spot such a target, even on an 1197, on the water. The full resolution of the sonar data is not displayed unless an external viewer such as HumView or SIView is utilized. I still prefer SIView for the best image quality, but HumView is excellent as well.

I concur with the others: now that you have asked, you owe us an answer!

doo600 · « **Reply #10 on:** April 07, 2010, 10:45:32 PM »

I know, I have to go look for this damn thing in freezing cold water, gotcha

Another question, if the mark saves the photo as a snapshot, where do I retrieve the .dat file I can use in humviewer?

sonar2000 · « **Reply #11 on:** April 08, 2010, 07:55:11 AM »

when you record or snapshot you must have an Sd card in the HB slot. It saves the data on the card not in the HB. so you move the SD card to the PC card reader and access. Hint: for recordings it will help in view speed if you copy the recording over to the computer disk first.

Here is a link on this forum that might help.

http://forums.sideimagingsoft.com/index.php?topic=937.0

cold water. that is why we have dry suits.

Chuck

bob · « **Reply #12 on:** April 08, 2010, 10:12:48 AM »

The center of the 4X zoom was only 12.6 feet out from the boat. The 77 feet is the distance to the object at the time the snapshot was taken.

bob baldwin
bryan, texas
997c SI
1197c SI
AS GRHA GPS

sonar2000 · « **Reply #13 on:** April 08, 2010, 11:16:14 AM »

ok the cursor is 12.5 feet to the port side. The distance is 77 feet behind the boat. I understand. Thanks Chuck

bob · « **Reply #14 on:** April 08, 2010, 11:39:45 AM »

Chuck, The center of the zoom box (Cursor) was about 12.6 feet out to the port side (of the transducer) as the boat passed the object. By the time the decision was made to take a snapshot, the boat had moved about 77 feet from the object (Distance) at 2.1 mph. So, in order to go back to the object, he would have to turn to 125 degrees (BRG) and go 77 feet to get back to the waypoint. A course of 302 degrees minus 180 degrees equals 122 degrees straight behind the boat, but because it was off to the port side, the actual direction is 125 degrees. So, it's not 77 feet out, but more like 77 feet back and slightly off to the side. The Distance and BRG is the information for getting back to the waypoint. I hope that I didn't just make it more confusing!

bob baldwin
bryan, texas
997c SI
1197c SI
AS GRHA GPS

sonar2000 · « **Reply #15 on:** April 08, 2010, 11:45:20 AM »

Great Bob.. Thanks for the description. Your reply clearfies the screen snapshot. Thanks. Chuck

bob · « **Reply #16 on:** April 08, 2010, 11:52:24 AM »

Chuck, You are most welcome - I'm not too good at explaining myself sometimes! What ever the object is, it was only about 12 feet away, and magnified four times. I won't try to guess what it is, but I hope we get an update.

bob baldwin
bryan, texas
997c SI
1197c SI
AS GRHA GPS

sonar2000 · « **Reply #17 on:** April 08, 2010, 01:05:57 PM »

Yes I think we are all interested in what it turns out to be.......4 feet deep should not be too much of a search. Chuck

IRC Kevin · « **Reply #18 on:** April 08, 2010, 02:27:10 PM »

It sure does look like a pistol (or just the frame) of some variety. I'm surprised were not trying to guess the type!

sonar2000 · « **Reply #19 on:** April 08, 2010, 02:30:17 PM »

Depends on the way you view it. From one angle it looks like a gun From another it looks like a hobby horse head. As to guesing the type. We will wait untill they dive on it and tell us what is really is. Chuck

RGecy · « **Reply #20 on:** April 08, 2010, 05:02:12 PM »

The shadow is what leads me to say its not a gun. Its just too rounded and doesn't look like a gun in the shadow.

Robert

doo600 · « **Reply #21 on:** April 08, 2010, 05:41:37 PM »

Can't get in the water til next week. Looking at the shadow it looks way too tall for a gun now. I did manage to record the simulation mode in the fire station and moved it to Humviewer. Very cool program, learning a lot. Can snapshots work wih humviewer? Doesn't want to. It wants to work with google earth but I can't get it to work with that either. I'll keep trying.

I also got some photo's from actual recoveries from our side scan sonar team who has the $30,000 plus tow behind fish. The images are clear and actually pretty close to the Side Imaging quality.

Jolly Roger · « **Reply #22 on:** April 09, 2010, 05:13:45 AM »

Doo,

the snapshots are not working with HumViewer, but you can create snapshots with HumViewer from your recordings.

To do this, you stop the recording at the point where you want to make the snapshot. then click on file in the upper left corner of your PC screen and choose "Save snapshot".
A pop window will show up and you can choose where and under what name you want to save the snapshot. You can choose the format between .png, .bmp and .jpg as well.

I keep my snapshots in an extra folder in the corresponding folder of the recording and leave the recording number in the name to have a reference in what recording the snapshot was taken.

Concerning the Google Earth issue:
Where's the problem there?
You need to choose what should be shown in Google Earth once you clicked on "show in Google Earth" in the tools by checking the relevant check boxes in the pop up window.
If you have a big recording you want to view in Google Earth, it will take a while until Google Earth will show it. So you gotta be patient and wait until the data is loaded.

Regards / Harry

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Author Topic: Anyone else think this is a gun? (Read 10999 times)

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