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  Humminbird 987c Images and stuff

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Author Topic:   Humminbird 987c Images and stuff
highanddry posted 09-23-2006 11:54 PM ET (US)   Profile for highanddry   Send Email to highanddry  
Here are a few image captures from our Humminird 987c installed on our Nanucket 190. These are in freshwater, due to an unexpected calling our trip to the Gulf was cancelled but we did go to one of our favorite lakes. These images should be typical of what would be seen in fresh or salt water (in good conditions).

http://i23.photobucket.com/albums/b395/JRWJR/00004.jpg

The actual depth was 80 to 110 feet, the indicated depth was upslope under the Nantucket.


http://i23.photobucket.com/albums/b395/JRWJR/00005.jpg

An impressive underwater ridge with sheer drop offs.

http://i23.photobucket.com/albums/b395/JRWJR/00001.jpg

A small 35 foot cabin cruiser sunk in a ravine on a steep slope. The ravine somewhat shields it from the scan.


http://i23.photobucket.com/albums/b395/JRWJR/00006.jpg

Individual trees at depth.


http://i23.photobucket.com/albums/b395/JRWJR/DSCF0078.jpg

The panel on the 'tucket.


http://i23.photobucket.com/albums/b395/JRWJR/DSCF0046.jpg

The First Mate at the helm.


http://i23.photobucket.com/albums/b395/JRWJR/DSCF0103.jpg

and me returning from an image verification--lol.

highanddry posted 09-24-2006 12:05 AM ET (US)     Profile for highanddry  Send Email to highanddry     
Some interesting things, we are still learning to use the 987 and figuring it out. Sometimes there are ghost images which I believe are reflections from the returning wave bouncing off the lower unit.

Also notice the "stuff" trailing along the surface in some of the images--that is the propeller wash and exhaust as I had looped back on it.

Another thing, while I may move the transducer now that I have used it several times I have some ideas but nonetheless, in standard and DF mode, I have bottom lock pretty solid up to 35ish MPH.

The unit provides good data and extraordinary images when the object is approached from it's best angle and from other angles some objects will hide from you quite well.

You cannot use it to find buried Spanish treasure ships unless the ballast stones are clearly above the clean sand--however--for normal diving and fishing uses--this thing is amazing--AMAZING-- and there is nothing that compares to it.

davej14 posted 09-24-2006 08:59 PM ET (US)     Profile for davej14  Send Email to davej14     
Fixed links for highanddry.............

These images should be typical of what would be seen in fresh or salt water (in good conditions).
http://i23.photobucket.com/albums/b395/JRWJR/00004.jpg

The actual depth was 80 to 110 feet, the indicated depth was upslope under the Nantucket.


http://i23.photobucket.com/albums/b395/JRWJR/00005.jpg

An impressive underwater ridge with sheer drop offs.


http://i23.photobucket.com/albums/b395/JRWJR/00001.jpg

A small 35 foot cabin cruiser sunk in a ravine on a steep slope. The ravine somewhat shields it from the scan.


http://i23.photobucket.com/albums/b395/JRWJR/00006.jpg

Individual trees at depth.


http://i23.photobucket.com/albums/b395/JRWJR/DSCF0078.jpg

The panel on the 'tucket.


http://i23.photobucket.com/albums/b395/JRWJR/DSCF0046.jpg

The First Mate at the helm.


http://i23.photobucket.com/albums/b395/JRWJR/DSCF0103.jpg

and me returning from an image verification--lol.

Chuck Tribolet posted 09-24-2006 10:14 PM ET (US)     Profile for Chuck Tribolet  Send Email to Chuck Tribolet     
Sheesh, you get the latest electronics and then trust your
life to that ancient SCUBA reg????

Thanx for the pix.


Chuck

PeteB88 posted 09-24-2006 10:49 PM ET (US)     Profile for PeteB88  Send Email to PeteB88     
How about some fish pictures? What do fish look like on that thing?
highanddry posted 09-25-2006 02:33 AM ET (US)     Profile for highanddry  Send Email to highanddry     
Chuck, off subject but that is a Phoenix Royal Aqua Master, one of only eight in existence currently though more may be coming. It has a brand new design silicone diaphram made by a friend, it has one of eight personally engraved Phoenix nozzle assemblies designed by another friend and uses the latest Titan first stage components installed by myself and supporting both LP and HP outlets. It also is tuned by myself, assembled by myself (I work on turbine engines), built by myself and also sports a custom built horsehoe lever and other parts by myself and new manufacture super stretch hoses, modified cage valves from a Tekna and many other advanced features--NO--NO regulator on the planet is it's equal at depth or shallow--it is effortless and the harder you work it the easier it gets and it is stone cold reliable--rock solid. I have brand new plastic Apeks and Legend, they simply cannot compare nor do they support my rigourous solo diving like the Phoenix Royal Aqua Master. I began diving in 1966 with double hose regulators, I see no need to change to an inferior, less durable and less reliable single hose design with less capability. Like my old LA County/NAUI instructor told me, single hose are for girls.

The more I use the 987c the more impressed I become with it. Nothing is perfect and certainly it has some oddities. I would wish for a zoom mode, perhaps a variable range for the side scan to reduce the water column, perhaps the abiliy to record short video in addition to the current freeze frame recording mode. Also, despite being told by many otherwise, the unit holds good bottom echos and reasonable detail at speeds well into the 30s before skipping.

The GPS which is a seperate GPS external to the unit locks on rapidly without fail and the screen is readable even in bright sunlight though obviously like any unit some shade makes it much more contrasty.

highanddry posted 09-25-2006 02:50 AM ET (US)     Profile for highanddry  Send Email to highanddry     
Yes, the standard mode which is dual frequecy capable and can show both frequencies on a split screen and does have a zoom mode is the mode that works at speed--the side scan works up to about 8 MPH give or take. The picture that is of the "cabin cruiser" notice the "stuff" at the surface. That is my propeller trail and exhaust as I did a quick 180 and came back over the mark.

Yes, you can see fish in the standard sonar mode and I saw bait schools and what I beleive are game fish close in while in side scan mode. I am still learning but for example, I could see the 3/8 line from a bouy I set and my wife could see me on the cabin cruiser!!! Unfortunately I did not have the SD card in the slot, I had forgotten it in the computer. Darn that so no pics from that day.
Hopefully next time I get it out I will explore more of it's capabilities and I will try to get some fish pics at least in the standard mode.

On the paddle wheel wreck, that darker stripe--that is an inset promenade walkway with hand rail and what is causing the darker stripe is the shadowing.

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