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Garmin Decesent MK2i & T1 Transmitter Cold Water Review


After already reviewing the Garmin MK2i, we've now had the chance to fully look at the T1 transmitter and also how it handles colder waters.

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Garmin Decesent MK2i & T1 Transmitter Cold Water Review
#ScubaDiving #Scuba #Garmin

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Chris Buck
Chris Buck
1 year ago

What was the lowest temperature for your dives? Someone said two died during their cold water dive in Ontario, Canada. Not sure if it was a fluke or what.

David Rogers
David Rogers
2 years ago

Too many ads.

Alex G.
Alex G.
3 years ago

Hi Marc, just wonder, you used the T1 too in cold water. May I ask if you had the same problem like James of Divers Ready that the sonor techonology was hearable and bothered you? I went diving yesterday the first time here at the lake of Zurich in Switzerland and did not hear anything or felt somehow bothered. Love to hear your view on this… Best regards from Switzerland, Alex

Scuba Diver Magazine
Scuba Diver Magazine
Reply to  Alex G.
3 years ago

I made a conscious effort to listen for the ‘ping’ on all my dives so far with the T1 and have not heard anything. Because of COVID, they have all been in the cold waters of the UK, i will be interested to see if I can hear anything on a warm-water dive.

Alex G.
Alex G.
Reply to  Alex G.
3 years ago

@Scuba Diver Magazine Hi Marc, Thank you for your reply. I also dove it in the lake with my Waterproof H1 polar hood on. There I didn’t hear anything. Unfortunately, I have no pool to check it at the moment. I also didn’t hear it on the video of James, but maybe my ears are so bad… 🙂

Frank Cosgrove
Frank Cosgrove
3 years ago

I’m using mine in cold water, defo best dive computer I have used to date

kui Q
kui Q
3 years ago

This is not honest .
The main problem of the transmitter is the sound that people can actually hear.
We use 3 transmitter for tec dive or we have 2 dives with 4 transmitters .
It will be a big problem hearing the ping sound every other second

Scuba Diver Magazine
Scuba Diver Magazine
Reply to  kui Q
3 years ago

I have now done several dives in cold water with the T1 transmitter, and try as I might, I have not heard that ‘ping’. I will reserve judgement until I dive it in warm water, as I became aware of the ‘ping’ from James at Divers Ready, so I was listening for it when I dived it. Maybe because I had a hood on, but I even put my head right next to the T1 and could not hear anything.

Justin Smith
Justin Smith
3 years ago

Is this something that a brand new diver would benefit for getting or would it be too much computer? That being said I have “older” eyes and would it be difficult to see? I like the thought of the Mares Genius with the bigger screen and color?

Scuba Diver Magazine
Scuba Diver Magazine
Reply to  Justin Smith
3 years ago

As I said in my initial review of the Descent MK2i, this can cover every type of diving, from recreational right up to full technical, including CCR, as well as free diving. So, one way of looking at these when considering a purchase is the fact that you will never ‘out-grow’ it as your diving skills develop. You might never go down the tech route, but if you do, then the computer is more than capable of going with you. In basic recreational mode, the MK2i is just as straightforward and easy to use as entry-level computers. The screen is small compared with the Perdix AI, the Mares Genius, etc, but that said, it is still very clear and easy to read even from a distance away.

Joe Hennessy
Joe Hennessy
Reply to  Justin Smith
3 years ago

Justin – you will be much better spending the money in a Teric over this. People saying the screen easy to read is a joke. You have to turn it’s backlight on to read it in anything but bright sun (paying 1500 and they can not even figure out how to put an oled in it. Every other top tier smart watch now uses oled)

Oh and invest in the T1 transmitters and you are stuck with them only working with garmin and right now it’s only the MK2i they work with. No guarantee they will work with the next iteration of the mk watch. As a person starting out I would not risk that large of an investment unless you wanted a new garmin fenix as your smartwatch anyway. In that case even if you replace it with a different dive computer or don’t dive enough you still are getting use out of it (just in a bigger watch than a fenix).

But you have way better support with the shearwater Teric and a much larger pool of divers using it and supporting it.

Laminar 088
Laminar 088
3 years ago

Thanks for the update. Not enough reviewers mention or comment on the Sonar “ping” from the T1 Transmitter? What’s is your take on it? Is it loud enough for others in a dive group to pick up on (for example)?

Scuba Diver Magazine
Scuba Diver Magazine
Reply to  Laminar 088
3 years ago

I was actually listening for the sonar ‘chirp’ after watching, and speaking to, James from Divers Ready, but try as I might, I could not hear it. Now, this might be due to my 5mm hood, or the fact my ears were half-frozen in the single-digit water, but I could not hear it at all. I am looking forward to the opportunity to try the transmitter in warm water where this is not an issue.

Timo Buhmann
Timo Buhmann
Reply to  Laminar 088
3 years ago

@Scuba Diver Magazine in James review you could clearly hear the sound. I’m quite sensitive to such kind of sound, therefore I would never spend any money to it before trying somewhere first. I also was thinking about, what fish around you would say, when they rely on sonar as well. They may stay away from you 🙂

Scuba Diver Magazine
Scuba Diver Magazine
Reply to  Laminar 088
3 years ago

@Timo Buhmann I know, which is why I was really listening for it. It will be interesting to try it in warm, fish-filled warm water to see the effects, if any, of the sonar – and see if I can hear it then! But I had two of us listening out for it throughout the dives, and my buddy had their hooded head literally right next to the transmitter at one point, and we didn’t hear any chirping at all.

Laminar 088
Laminar 088
Reply to  Laminar 088
3 years ago

@Scuba Diver Magazine thanks Mark! James’ Divers Ready review is exactly where I was first made aware of this. He certainly thought it was an issue, so before even thinking of paying nearly $2000.00 (U.S.) I would want to know more. Looking forward to your opinion after a warm water dive.

Michael Lambert
Michael Lambert
Reply to  Laminar 088
3 years ago

if i were diving in an area where i wanted to listen for whales, i would be furious if someone’s computer started chirping. i dont see the extended range of a sonar transmitter being an advantage for most people; it seems gimmicky at best. the cost is also unbelievable considering the shelf life of most wearables is ~1 year.

Mohamed Nosseir
Mohamed Nosseir
3 years ago

Thanks for review
I want compare between Garmin Descent Mk2i with transmitter Vs Shearwater perdix AI with transmitter aqualung
Underwater diving 35 meters
First Dive and second dive
Thanks 👍

Scuba Diver Magazine
Scuba Diver Magazine
Reply to  Mohamed Nosseir
3 years ago

Well I dived the Descent MK2i alongside my Shearwater Perdix AI for the entire week in the Maldives, and as they both use the same algorithm, there was no real difference in NDLs, etc, between them regardless of the dives, which ranged from deep channel dives to shallow dives with mantas, etc.

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