Got my Raymarine Dragonfly

Here are some more images. I am still playing with it. Not an easy unit to understand for newbies. The 2d does not show the standard arches I am used to. The Di shows fish as tiny specs. The split screen really seams to be best to figure out what you are seeing.

A few more shots. I believe the thermocline is at about 12'. I have HDS shots to compare to these and will upload tomorrow.

http://i453.photobucket.com/albums/q...ps213f7496.jpg

http://i453.photobucket.com/albums/q...ps45772ad2.jpg

http://i453.photobucket.com/albums/q...ps4705becd.jpg

http://i453.photobucket.com/albums/q...ps039f19ee.jpg

http://i453.photobucket.com/albums/q...ps0e117795.jpg

....Bill

This is what I am more used to seeing.

http://i453.photobucket.com/albums/q...ps355b47ab.png


http://i453.photobucket.com/albums/q...ps6bf34cb4.png

how good is the image over a down tree? can you see fish?

Quote:

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Originally Posted by brettw

I plan on using it full time di

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I think this is a good plan for the current version Dragonfly...

:ThumbsUp

Rickie

Monte ...

What are the beam angles and frequencies for the 2d and the DI in the Dragonfly ... ??

Rickie

Quote:

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Originally Posted by rnvinc

I think this is a good plan for the current version Dragonfly...

:ThumbsUp

Rickie

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Agreed

....Bill

Quote:

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Originally Posted by rnvinc

Monte ...

What are the beam angles and frequencies for the 2d and the DI in the Dragonfly ... ??

Rickie

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Not sure. It uses the "chirp"

....Bill

Quote:

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Originally Posted by MonteSS

Not sure. It uses the "chirp"

....Bill

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I have been reading on the topic of CHIRP...(most of it is way over my head)...

I do understand that CHIRP uses a "frequency range" instead of a "tone pulse" that most sonar utilizes...

I did find possible frequency ranges and beam angles here...
RAYMARINE Announces DragonFly - Moderated Discussion Areas

The SONAR is said to have chirp technology. The device employs two ranges of frequencies. A range of 320-kHz to 380-kHz is used, as well as a range from 170-kHz to 230-kHz. The SONAR signals are conducted via a new Raymarine transducer, the CPT-60. The transducer is said to have dual characteristics. The higher frequency transducer is described as providing a "fan beam" of dimensions 1.4-degrees by 60-degrees. The lower frequency transducer is said to provide a conical beam of 25-degrees. In combination the two signals, the two transducers, and the chirp signal processing are said to deliver a clear, life-like image of the bottom and its structure. Raymarine refers to these features as ClearPulse and DownVision.

Further down in that same thread ... It seems that NAVICO has filed patent infringement against RAYMARINE for the introduction of Dragonfly...(sounds ghostly familiar to another patent infringement case not that long ago of HB filing against NAVICO... Interesting...)

I'll be watching that thread...

Rickie

the fact that it's a wide beam may be why the fish appear as specks, DI I'm talking about
in 20' of water a 60 degree beam would be scanning how much bottom ?

I was beginning to become interested in the dragofly up until you started giving all of its bad points then I lost interest REAL FAST. I'll keep looking since this will be m first unit.

FISH ON:fish