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Some dragonfly questions from a new owner

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Some dragonfly questions from a new owner

Old 07-09-2014, 06:36 PM
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Default Some dragonfly questions from a new owner

Hi all,
Just installed my new Dragonfly...... Seems pretty impressive on my maiden outing..... However, I have some questions if anyone can assist:

1. Can I get my dragonfly to show waypoint names next to the waypoint symbol?

2. The Dragonfly chart screen displays water surface temperature, depth, SOG, COG, latitude, and longitude on its screen.

Are those items fixed...Can I replace any of the six with time to destination, or voltage or clock time for example ?


3. I use the dragonfly with a thru hull CPT-70. Using it for first time today I was surprised that it could not hold bottom at greater than 21 knots in water depth of 90 feet.
Are there some settings that I need to adjust to improve this ?

This is somewhat surprising / disappointing for a thru hull transducer when I see elsewhere in this forum people are holding at 30 to 35 knots with transom mount transducers
Old 07-09-2014, 08:24 PM
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1. No
2. Fixed
3. The thru hull transducer is not a high speed fairing model. So, it is getting aeration. The transom mount versions can be placed farther under water and will not likely fall victim to the same affects.


Can you post some screen shots for others to see the thru hull performance?
Old 07-10-2014, 10:36 AM
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Thanks for the reply.... I will take some screen shots on the weekend.

But, just for clarity... The boat is 32' long and the transducer is about 9' from the stern and about 6" from the center line. I wouldn't have thought that aeration was not an issue there.... Further, I had a garmin gpsmap before with its through hull transducer at that very location, and it held bottom up to 35 knots, so, again, it's hard to imagine that it is aeration
Old 07-10-2014, 01:37 PM
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3. The thru hull transducer is not a high speed fairing model. So, it is getting aeration. The transom mount versions can be placed farther under water and will not likely fall victim to the same affects.
Depends on the Hull. I begrudgingly installed one on a 19 Cape Horn. The step at the transom would not allow for the placement to get it in clean water. There was also a thru hull fitting to deal with, which was in the spot that the X-ducer needed to be for a thru hull. The thru hull fitting was deleted and X-ducer installed there. So I installed the thru hull X-ducer.

But the bottom line is.....It's just another flim flam piece from Raymarine.

Poor design mount....Piss Poor design power cord connection.... No NMEA Output....

I had tried to talk the guy into Garmin......"He needed Simple". The thru hull X-ducer for the Garmin would be $100 cheaper also...[B-60]



This thing looses bottom on the regular Sonar @ 14MPH and holds bottom with the "Downview"... Go Figure?
Old 07-10-2014, 01:59 PM
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Originally Posted by warthog5 View Post
Depends on the Hull. I begrudgingly installed one on a 19 Cape Horn. The step at the transom would not allow for the placement to get it in clean water. There was also a thru hull fitting to deal with, which was in the spot that the X-ducer needed to be for a thru hull. The thru hull fitting was deleted and X-ducer installed there. So I installed the thru hull X-ducer.

But the bottom line is.....It's just another flim flam piece from Raymarine.

Poor design mount....Piss Poor design power cord connection.... No NMEA Output....

I had tried to talk the guy into Garmin......"He needed Simple". The thru hull X-ducer for the Garmin would be $100 cheaper also...[B-60]



This thing looses bottom on the regular Sonar @ 14MPH and holds bottom with the "Downview"... Go Figure?
I think you are taking the Dragonfly out of the void which it Filled. It was created as a stand alone down view unit at an attractive price for those who only needed/wanted depth as well as the newest technology.
Why would Raymarine create a new product to compete with technology already available in their other product lines?

I have both a Raymarine E7d & A78 with the CPT transom mount transducer and have no problem tracking bottom in either the down view or sonar guise from 0 to 54 mph in choppy water.

Last edited by vertigo; 07-11-2014 at 05:19 AM.
Old 07-12-2014, 08:31 AM
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Sounds like I might have done better to use the transom mount transducer rather than the thru hull ?
Old 07-12-2014, 08:41 AM
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Originally Posted by CME View Post
3. The thru hull transducer is not a high speed fairing model. So, it is getting aeration. The transom mount versions can be placed farther under water and will not likely fall victim to the same affects.
The thru hull should work at speed, and his boat isn't large enough where it needs to push outside of a boundary layer. It should work. There is nothing that should be causing aeration either. If an old thru hull worked there, why would the new transducer be causing its own aeration?
Old 07-12-2014, 08:47 AM
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Well, the old garmin transducer was circular and had a very low profile.... The dragon fly transducer is about 8" long, elongated diamond shape and stands about a Half inch proud of the bottom surface.
So while I agree with you that I would expect no aeration issues, I can't overlook the suggestion from CME that it may be an aeration issue.... If it is, I'm screwed, no simple fix for that...
Old 07-12-2014, 09:11 AM
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Originally Posted by ttphilip View Post
Well, the old garmin transducer was circular and had a very low profile.... The dragon fly transducer is about 8" long, elongated diamond shape and stands about a Half inch proud of the bottom surface.
So while I agree with you that I would expect no aeration issues, I can't overlook the suggestion from CME that it may be an aeration issue.... If it is, I'm screwed, no simple fix for that...
If it is, poor design then.
Old 07-13-2014, 07:08 AM
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the transducer can work well. depends on how and where it's installed. using this transducer. http://www.westmarine.com/buy/raymar...ucer--14907901. somewhere out there are screenshots of the bottom at over 55 mph.
Old 07-13-2014, 08:39 AM
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I have the bronze thru hull and I only get about 13mph before it is overtaken by bubbles. Hopefully a high speed fairing block will be out soon.
Old 07-13-2014, 08:44 AM
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Here is my dragonfly doing 30 knots with a ducer location pic.

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Old 07-15-2014, 06:26 AM
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here's a pic i found. looks like it was hanging in pretty good at 61.
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