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Alex W 07-20-2013 12:14 AM

Simrad RS35 review (VHF + AIS)
I ordered a Simrad RS35 in April at Defender's annual sale. It arrived in late June, just in time for my summer cruise. I've been using it for about 20 days now, 4-8 hours per day.

I was very excited about the RS35 on paper. It uses NMEA 2000 (or 0183) instead of only using NMEA 0183 like the Standard Horizon VHF+AIS radios. This would make for easier wiring and not use up all of my 0183 ports on my Raymarine e7d plotter. The remote mic (HS35) is wireless, which makes for much easier installation and keeps one more wire out of my crowded pedestal.

Summary: Don't buy, at least not yet.


The installation was easy, including networking. I ran a Raymarine SeatalkNG (NMEA 2000) drop to near the radio, then used a SeatalkNG to NMEA 2000 converter cable to plug in the radio. My plotter and the rest of the hardware on the network found it easily.

Reception is as good as other fixed VHF radios that I've used.

The optional RS35 remote mic has good ergonomics and easily clips to something in the cockpit, a pocket, or PFD.

AIS integration with my Raymarine e7d was easy. As soon as I hooked it up the plotter started to draw AIS-transmitting boats on the map and lets me see their speed, course, and all other AIS details.


Sound quality is so-so. I don't find the HS35 to be loud enough when sailing in high winds (20 knots or more) or when motoring. The quality also isn't great, fidelity could be a little better. It's not that VHF ever sounds great, but this one sounds worse than my previous Uniden (not a high standard for a radio).

Responsiveness is also mixed. If you try to use the unit too quickly it won't respond to button presses. The menu system is slow to go through.


There are some annoying bugs in the software. The worst is that when listening to channel 16 the radio randomly switches over to weather. This happens about once or twice per 8 hour cruising day. I don't have any weather alert features turned on (I've checked this many times). The handset and radio both still show 16. Getting back to channel 16 requires pressing WX twice, once to convince the handset that it is in weather mode, and once to switch back to VHF mode.

The scan feature is terrible. Rather than letting you set a list of stations to scan it scans the entire band. I'm currently travelling in Canada where weather is broadcast on 21 24x7. This makes scan entirely useless because it will always stop on 21.

You can do a 3 channel scan, but 2 of the channels are fixed at 16+9.

On my other radios I often scan the frequently used or traffic channels (9/16/22A/13/68/69/72/5A) to catch most of the interesting conversations on the water. On the RS35 I can't do that.

The RS35 wasn't tested with Raymarine equipment and can't pick up the GPS coordinates from my e7d (so DSC does not work). I checked with Simrad support and got the list of PGNs necessary and checked that the e7d is sending those PGNs, but no luck. Simrad was not responsive when I asked what equipment they've tested the radio with.

Simrad customer service is not very helpful in general. They often don't respond to my emails, or respond to only one of the questions. There is not a customer service forum like the one that Raymarine provides. This is a big disappointment to me, especially since I had been considering switching to the sailing oriented B&G Zeus MFD. With their customer service I can't see doing so.

I haven't used the lower cost Lowrance Link-8, but it shares a lot with the RS35, so I assume it has some of the same issues. This is too bad because it is the cheapest VHF+AIS radio on the market.

I also haven't used the Standard Horizon GX2150, but have read enough reviews to know that people find it to work very well. It would have been more complicated for me to install due to it's use of NMEA0183 (I'm using both ports on my MFD), but that extra cost/hassle would have been worth it compared to dealing with the annoyances of the RS35 every day.

If Simrad can fix the scan mode, bugs, and test the RS35 with the most popular MFDs (Raymarine and Garmin because their own brands) then I could recommend buying it. Without that I don't.

Alex W 07-23-2013 11:48 AM

Re: Simrad RS35 review (VHF + AIS)
The NOAA automatic switching was terrible yesterday, the radio switched into weather radio about 8 or 9 times (I lost count) in a 6 hour sail. This could be a safety issue in areas like Dodd's Narrows where one needs to monitor 16 to make safe passage.

Navico/Simrad emailed me yesterday to say that there is a new software update that fixes the NMEA 2000 issue. They haven't mentioned the others.

There is a thread on this radio in the comments found here:
Panbo: The Marine Electronics Hub: Simrad RS35 & Lowrance Link-8: DSC VHF + AISrx + N2K = YES!

Based on other users I appear to be having a better than average experience.

vraymond108 09-15-2013 09:12 PM

Re: Simrad RS35 review (VHF + AIS)
Thanks Alex for the review. I was going to order this radio for it's features but with your review I think I will wait. My hunch is that SH will come out with a NMEA 2000 version or versions soon since they have started discounting several models.
Sounds like it would be a better bet. I think Navico has a tendency to rush products to market without extensive testing. I personally think it is a bad way of doing business especially when your review is so readily available for all boaters to see.
Thanks again.

Alex W 12-15-2013 01:19 PM

Re: Simrad RS35 review (VHF + AIS)
I took my radio in to the local warranty service center have the firmware upgraded. That went sideways and so they sent it into Simrad, who responded by sending me a brand new radio.

The new firmware solves the problem with talking to my Raymarine e7d. I haven't used the radio enough to comment on any other issues. It still does not have a programmed channel scan.

I'm happy to have a working radio, but have had much better experiences with Raymarine service than Simrad service and am unlikely to buy more Navico equipment.

baboon 12-16-2013 12:05 PM

Re: Simrad RS35 review (VHF + AIS)
I was talking to a new boat broker this summer who stated they have good luck with Simrad electronic packages on their new boats, but specificaly delete the VHF radio because other brands are better.

Anastasius 12-14-2019 07:56 PM

Re: Simrad RS35 review (VHF + AIS)
Does anyone know what is a compatible headset for hands free operation with hs35, please?

SHNOOL 12-15-2019 09:06 PM

Re: Simrad RS35 review (VHF + AIS)
Dredge alert old thread.

PS: standard horizon has inexpensive unit VHFs now with built in GPS and NMEA 2000 interface as well.

BarryL 12-16-2019 11:02 AM

Re: Simrad RS35 review (VHF + AIS)

THere is a wireless handset available for the RS35.

It's been available for a few years now. I have one and it works fine.



Originally Posted by Anastasius (Post 2051641338)
Does anyone know what is a compatible headset for hands free operation with hs35, please?

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