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Author Topic:   Instrumentation Choices: Northstar, Interphase Twinscope Foward Scanning SONAR
donaldintoronto posted 11-17-2006 06:22 PM ET (US)   Profile for donaldintoronto  
I am about to order a 305 Conquest, fully loaded with everything but the fishing gear. I was planning on getting the upgraded 6-kW RADAR and two-screen Northstar instrument panel, being sold on the notion of full integration, but before committing would like to hear some views from owners who have this instrument setup, or who have used other alternatives.

I would also like to know if anyone has experience with the Interphase Twinscope forward-scanning SONAR, which I am considering for navigation in the very rocky waters of Georgian Bay.

Finally, are there any options that owners would suggest I either add or delete?

handn posted 11-17-2006 06:45 PM ET (US)     Profile for handn  Send Email to handn     
I have a 305 with a Furuno NavNet and an Interphase Twin Scope. With Regard to the latter, I use it quite a bit for navigation here in the Sea of Cortez where the charts for most of the area are British Admiralty 1995 and leave a huge amount to be desired. We have uncharted pinacle rocks and the Twin Scope in the vertical mode is useful in picking them up before that dreaded crush.

My NavNet has a good fish finder but I use the Interphase a lot as a fish finder. It is quicker than the Furnuno so I can see fish and structure sooner. I am less satisfied with the unit in the horizontal scan mode. It is supposed to show a navigation channel scanning side to side but mine doesn't at least not in meaningful detail.

I believe your Northstar is a sophisticated unit, capable of superimposing a radar image on top of the chart image. This feature is invaluable when navigating in the dark or in fog. I have never regretted getting the best electronics I could afford.

[Here the author invited the discussion to continue via email but I would counter and ask why not continue to discuss this topic here? The information shared will be useful to others--jimh.]


jimh posted 11-18-2006 06:16 PM ET (US)     Profile for jimh  Send Email to jimh     
[Article moved to SMALL BOAT ELECTRICAL.]
handn posted 11-18-2006 10:13 PM ET (US)     Profile for handn  Send Email to handn     
Oops, Proof reading error. The charts for the Sea of Cortez are British Adiralty 1895. If they were 1995, presumably they would be better.
As they are, the eastern shore of the Sea of Cortez near
Guaymas Sonora is positioned two miles incorrectly to the west. When I run to my favorite bass fishing place, my chart plotter with the ancient charts shows I am running on dry land.
jimh posted 11-19-2006 03:18 PM ET (US)     Profile for jimh  Send Email to jimh     
Northstar is usually top-notch. This new stuff from GARMIN might be a jump in performance, but it will probably be months before you can get one.
donaldintoronto posted 11-19-2006 05:22 PM ET (US)     Profile for donaldintoronto    
I'm operating in Canada, and service can be an issue with the some brands. I think my best realistic alternative to the twin factory-installed Northstar screens would be a pair of E-series Raymarine units, for which service is readily available. However, the E80 8" units are obviously considerably smaller than the Northstar 10.4", and the E120 12" units don't seem fit on the console unless bracket mounted.

I'd be curious to know how good the user experience and service experience is on the Northstar 6000i's, or if anyone has a better alternative for my console. With the risk of Brunswick selling NAVMAN/NORTHSTAR I'd really like to think this through.

Jim, I am comforted by your comments ont he quality of Northstar equipment.

donaldintoronto posted 11-19-2006 05:53 PM ET (US)     Profile for donaldintoronto    
Hank, thanks for the advice on the sonar, and all that I've learned from your other posts.

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