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Replacing vintage electronics on 26-y/o trawler

Old 08-23-2017, 04:44 PM
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Default Replacing vintage electronics on 26-y/o trawler

I am nearly ready to make an offer on a pristine 26-year-old 57-foot DeFever with a dual helm set-up that presently has old, outdated navigation equipment. I'm considering going with the latest and the greatest from Garmin: GPSMap 8624 MFD; GMR 2526 xHD2 radar; GHP Reactor autopilot w/ smart pump; GSD 26 sonar; GT51M-THP transducers; and Garmin Marine Wi-Fi adapter which will total around $29k.

The pricey 24" multi-function display is awesome to say the least. But with the addition of the Wi-Fi adapter I can run the boat from either the pilothouse or the flying bridge...

And with luck, it won't be outdated in just three years? ;?

And, I won't need to squint or use my reading glasses to see what the screen is displaying!

Adding this to $600 for a Class D AIS VHF radio will bring my investment to nearly $30k --- which seems like an obscene amount of money to pay for the navigation instruments.

Any thoughts? (Other than this guy must be crazy?)

My plans are to cruise the Caribbean, Central and South America... And this should get me there with ease...

Old 08-23-2017, 04:53 PM
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Does your price include the instillation? My wife and I wanted to buy an older trawler equipped with green screens and all. Radar, two 9" screens, transducer and network would have been good enough for us.

Also going to South America and the islands would point me in the keep it cheep direction due to the useless law enforcement, bribe for anything culture and high theft rate.
Old 08-23-2017, 04:54 PM
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I'd rather have two screens in case one goes out.
Old 08-23-2017, 05:10 PM
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Thanks for the input... Good point about a back-up if something fails... If I keep the old chart plotter, radar and autopilot in case of premature failure of the new equipment - that could be a back-up. My son who is an electronics system specialist will do the installation with me looking over his shoulder.


Also a great point about security... As far as the whole theft issue and bribery of or basic lack of law enforcement in South American ports goes --- leaving someone armed aboard while going ashore might be an option? I'm not sure how different countries look at boats with weapons --- but I will avoid places that object to having them aboard my boat. I've never had any problems when cruising in the Bahamas. But you never know.

I sure would hate to go ashore for supplies and come back to find the boat stripped! Damned pirates...
Old 08-23-2017, 06:09 PM
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Originally Posted by Cap'n Ed View Post
I am nearly ready to make an offer on a pristine 26-year-old 57-foot DeFever with a dual helm set-up that presently has old, outdated navigation equipment.

I'm considering going with the latest and the greatest from Garmin: GPSMap 8624 MFD; GMR 2526 xHD2 radar; GHP Reactor autopilot w/ smart pump; GSD 26 sonar; GT51M-THP transducers; and Garmin Marine Wi-Fi adapter which will total around $29k.



Any thoughts? (Other than this guy must be crazy?)



l

What transducer are you going to use with the GSD-26 ?

Are you going to use the GSD-25 for the GT51-THP?


Why not go with 2 7616xsv units?
Old 08-23-2017, 06:15 PM
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It is my understanding that the Garmin maps are proprietary and not necessarily the most accurate. I know on my older Garmin that was the case. You may want to do some research on Garmin mapping accuracy issues to see if they are still as prevalent as they used to be. If they still use proprietary maps that really locks you in. Hope you get the boat the Defever is a wonderful hull. I cruised full time on a 52' Sea Ranger hull.
Old 08-24-2017, 05:57 AM
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Do you really need such a high end transducer if you're not going to be fishing? (I'm assuming you won't be from a 57' cruising boat)
Old 08-24-2017, 08:01 AM
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I now have and have always had Garmin. I'll be looking at Simrad for the next ones.
Old 08-24-2017, 08:24 AM
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Originally Posted by semperfifishing View Post
What transducer are you going to use with the GSD-26 ? Are you going to use the GSD-25 for the GT51-THP? Why not go with 2 7616xsv units?
I am trying to decide what models I will get. Which is why getting advice here on THT is so helpful!

After your suggestion about two 7616xsv chart plotters I am thinking your suggestion makes a lot of sense. Or, maybe two GPSMap 8617's? The 8617's HD display is really appealing...

I still need to figure out which transducers will suit my needs best. Any suggestions? And since I won't primarily be fishing, that will affect my transducer choices.

Thanks for your reply!

Ed
Old 08-24-2017, 08:42 AM
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Being a bit familiar with the 57 DeFever having run one freelance over a couple of year period I have a bit of a different prospective on it. I don't suggest using the wifi anywhere in the sun. The screens of tablets and phones can not compare to a true marine MFD. While the 24 inch screen is impressive, you will be splitting it up to display the data.


My suggestion is below:
7616XSV and a 7616 at the lower helm
7616 on the flybridge
Garmin GMR 1226XHD2 radar (For navigation and weather you really don't need the 25KW the 12 will do just fine and safe you a fair amount of money)
GT51TH single (If the bottom is how I recall it, mounting a single GT51 should not pose any issue)
Icom M50641 AIS VHF


This gets you 3 dedicated marine screens as well as the WIFI, does away with the need for an external sounder module and come in over $1000 less than your original numbers.
Old 08-24-2017, 08:46 AM
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You could even go to the Garmin GMR 626XHD2 a 6KW radar and save another $1000
Old 08-24-2017, 09:20 AM
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Originally Posted by Cap'n Ed View Post
I am trying to decide what models I will get. Which is why getting advice here on THT is so helpful!

After your suggestion about two 7616xsv chart plotters I am thinking your suggestion makes a lot of sense. Or, maybe two GPSMap 8617's? The 8617's HD display is really appealing...

I still need to figure out which transducers will suit my needs best. Any suggestions? And since I won't primarily be fishing, that will affect my transducer choices.

Thanks for your reply!

Ed
If you are not really fishing then you do not need the GSD-26.
Just use a GSD-24 or a GSD 25...if you are not using a MFD with the built in sounder.

On that size boat best to use a fairing mounted transducer.
For the GSD-24 a B260
For the CHIRP GSD-25 a B275 LHW

Then if you do want to fish..both shallow and deep.. you can do so.


.
Old 08-24-2017, 02:55 PM
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Originally Posted by InternationalMarineBrian View Post
My suggestion is below:
7616XSV and a 7616 at the lower helm 7616 on the flybridge.

Garmin GMR 1226XHD2 radar (For navigation and weather you really don't need the 25KW the 12 will do just fine and safe you a fair amount of money).

I appreciate your comments. I guess having two screens (at the lower helm) would give me the ability to show charts with radar overlays on one screen and the sonar display on the other? I'm not sure whether I will use the flybridge or the lower helm more. Perhaps two screens up and two screens down would be better yet?

As for the different power radars, what difference would I see between a GMR626 xHD2 (6kW) or the GMR 1226 xHD2 (12kW).

Thanks!
Ed
Old 08-24-2017, 03:09 PM
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Originally Posted by semperfifishing View Post
On that size boat best to use a fairing mounted transducer.
For the GSD-24 a B260 --- For the CHIRP GSD-25 a B275 LHW.
Thanks for all of the helpful comments here on THT.

I believe now that the Garmin Panoptix FrontVu sonar is what will work best for my cruising needs? Garmin has a thru-hull, exterior, PS51-TH transducer (using the fairing block).

The forward looking feature provides "real time" views of what is ahead of the boat which is what I care more about. My fishing needs will be pretty much hit & miss.

Thanks,
Ed
Old 08-24-2017, 03:09 PM
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It depends on the enclosure, I typically run from below in bad weather to eliminate any potential injury going up and down the ladder. Plus A/C is nice!
You will find your sweet spot very quickly. Is the boat your looking at the old Bewitched?
25 kw. 12kw 6kw
Same beamwidth of 1.1 degree horizontal
96 nm 72 nm vs 72 nm
100watts vs 90 watts vs 65 watts power consumption
Both have same minimum range of 20 meters
Old 08-24-2017, 03:17 PM
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The PS51 live Vu Forward transducer is good for slow speed under 8 kts. It sees forward at a distance equal to up to 8-10 time the depth. Up to 300 feet ahead. If you went this route I still suggest a down imaging transducer such as the GT 50 or 51. Is this is the route you go would would simply upgrade one of the 7600 units to another 7600xsv to be able to function two GT series transducers using the 12 pin connector.
Old 08-24-2017, 04:54 PM
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Originally Posted by InternationalMarineBrian View Post
25 kw. 12kw 6kw
Same beamwidth of 1.1 degree horizontal
96 nm 72 nm vs 72 nm
100watts vs 90 watts vs 65 watts power
Theoretical ranges based on power out, PW, PRR and scan rate.

All will have the same radar horizon based on the mounting height, and unlikely to perform very differently within that limited range.

JMHO.

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