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DST810 problems |
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Mark_J1 
Rear Admiral 
Joined: 12 March 2013 Location: Dover&Medway UK Status: Offline Points: 690 |
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 Posted: 11 June 2025 at 10:25 |
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Kipwrite - does that Airmar UDST800 ultrasonic sensor work with the Airmar Cast app via Bluetooth? It would be a great solution if it did (already having issues with another DST810). I’m assuming not as there’s no mention of it in the product spec’s. I’d be very tempted if you can confirm it does but wouldn’t want to lose the ability to configure/calibrate and use without an MFD. Thanks.
Mark
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Hanse 400e "Grey Goose" Hull #31
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kipwrite
Commadore 
Joined: 14 October 2015 Location: New York Status: Offline Points: 495 |
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Posted: 11 June 2025 at 11:50 |
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Mark,
Never tried that - but the specs on the app don't include the 800 either. Not getting a half gallon of water in the boat every time the paddle wheel fouls is a real advantage. Then a few years ago, I had the flap on the thru hull fall out, which made cleaning the paddle wheel even more interesting. These don't seem to get fouled. Pricey but worth it. Edited by kipwrite - 11 June 2025 at 11:57 |
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Kipwrite
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Black Diamond
Admiral 
Joined: 24 October 2015 Location: Newport, RI, US Status: Offline Points: 1275 |
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Posted: 15 June 2025 at 18:35 |
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It also sounds like its thru-hull compatible with the DST800 and DST810. In other words, "same hole in the boat works..." |
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Rick
S/V Black Diamond Hanse 575 Build #192, Hull# 161 Newport, RI |
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kipwrite
Commadore
Joined: 14 October 2015 Location: New York Status: Offline Points: 495 |
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Posted: 16 June 2025 at 01:19 |
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Yes, you can use the same through hull.
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Kipwrite
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Black Diamond
Admiral
Joined: 24 October 2015 Location: Newport, RI, US Status: Offline Points: 1275 |
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Posted: 25 June 2025 at 20:30 |
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Its gone bad again. So much for the fix. I contacted AIRMAR. They asked for the serial number and said "we'll replace it". Usually, when the support team you have first contact with has the authority to just replace things, its a problematic device and they know that its easier to replace than to find out why. 
We can send you a replacement, If you send us your mailing address. we will get you one out. |
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Rick
S/V Black Diamond Hanse 575 Build #192, Hull# 161 Newport, RI |
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Black Diamond
Admiral
Joined: 24 October 2015 Location: Newport, RI, US Status: Offline Points: 1275 |
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Posted: 27 June 2025 at 11:24 |
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One more update: When I spoke with AIRMAR, I asked them "what would make the replacement any more reliable than the original DST810?". Was there some firmware update or bug fix that addressed the issue? The answer I got was that during COVID, they had to switch suppliers for specific components to meet manufacturing needs. This supplier has been the common thread for all the units at issue. Thus the serial number check. Apparently, they have now gone back to the original supplier. We'll see. |
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Rick
S/V Black Diamond Hanse 575 Build #192, Hull# 161 Newport, RI |
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Sounder
Commander 
Joined: 11 February 2021 Location: New York Status: Offline Points: 130 |
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Posted: 27 June 2025 at 11:38 |
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Thank you. I was able to source a replacement from my yacht yard. I was able to manage the replacement (it looks like the right paddle wheel), but I have not had a “sea trial” yet.
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David S
NADINE (Hanse 348 #199) Western Long Island Sound |
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Ratbasher
Vice Admiral 
Joined: 31 May 2017 Location: Cyprus Status: Offline Points: 818 |
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Posted: 27 June 2025 at 14:43 |
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I recently had no end of trouble with my 800, replacing it with the 810. All worked fine in harbour - and for 10 minutes at sea before the depth readings went haywire again on the new unit. I put no fewer than 7 ferrite beads on the cable by the transducer to counter RF interference and 400nm later including some heavier sea states its worked well.
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H400 (2008) 'Wight Leopard' Gosport, UK
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Black Diamond
Admiral
Joined: 24 October 2015 Location: Newport, RI, US Status: Offline Points: 1275 |
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Posted: 12 September 2025 at 01:35 |
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I've been working the problem this whole time. Speaking with Matt Fries (North American B&G Technical Support), he tells me that there are some subtle differences with the DST810 that make it problematic. For example, the paddles on the paddlewheel are a bit wider, which reduces the gap between the wheel and the side of the thru hull. Less tolerance for dirt, debris and growth. Not sure of that one. In any case, AIRMAR has seen my letters on the product quality and agreed to replace it with a UDST810 (ultrasonic). Just got the note today. I won't return the DST810 until the UDST810 proves more reliable, but its good that they are standing behind their product. |
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Rick
S/V Black Diamond Hanse 575 Build #192, Hull# 161 Newport, RI |
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Gale Force
Commadore
Joined: 26 June 2018 Location: Sri Lanka Status: Offline Points: 398 |
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Posted: 12 September 2025 at 06:34 |
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Hi to All
I have had issues with my Airmar 800 and have also found that it gets fouled very easily.I also found that the cable that connects to the backbone has a metal connection joint which over the years has become severely corrode.This has been replaced.However I have now gone with the UDST 800.My research told me that it was unreliable when first introduced due to being sensitive to voltage drops.However I am looking forward to years of good service from my new one.There is an electronic box to install but it is all plug and play. Duncan
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