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After 15 years of trusting Shearwater computers on technical wreck dives worldwide, I've just added the new Perdix 2 Bronze Journey edition to my kit as an offboard CCR diving backup. There's a reason Shearwater has become the computer of choice for almost all technical divers - their reliability at depth is unmatched. This isn't my first Shearwater - it's the latest in a long line of computers that have kept me safe on deep wreck.
The Perdix 2 Bronze brings meaningful technical improvements that matter at depth. The enhanced 2.2-inch high-resolution display delivers noticeably better color range and clarity for reading deco schedules in low-visibility wrecks, while the aluminosilicate toughened glass provides superior impact resistance during tight wreck penetrations. Other new features include customizable vibration alerts, air integration longer battery life. The Bronze Journey edition takes all these proven Perdix 2 improvements and wraps them in a bronze titanium bezel that mirrors the patina of the historic wrecks we explore - connecting the technology to maritime heritage.
In this video five I highlight five, often less known, features that I love;
🔧 Pre-Dive Planning Capabilities -
📊 Detailed Decompression Stop Breakdown
⚙️ Modifying Gases Underwater
📈 Changing Gradient Factor High During the Dive
💨 Adjusting PO2 Underwater**
The complete upgrade list from standard Perdix to Perdix 2 Bronze:
✅ Enhanced high-resolution display with better color range
✅ Aluminosilicate toughened glass for impact resistance
✅ Customizable vibration alerts (NEW for CCR diving)
✅ Air integration for up to 4 transmitters (NEW for your setup)
✅ Optimized 60-hour battery performance
✅ Three axis tilt-stabilised digital compass
✅ Bronze titanium bezel connecting to maritime heritage
Show More Show Less View Video Transcript
0:00
After 15 years of trusting sheer water
0:03
computers on hundreds of deep technical
0:05
wreck dives, I've recently added the new
0:08
Perix 2 bronze journey edition to my kit
0:12
and it's now my offboard CCR backup of
0:14
choice. It's a really important computer
0:17
to me as it's the one that I use to
0:19
control my decompression. Now, there's a
0:21
reason she water has become the computer
0:23
of choice for almost all technical
0:25
divers and integrated into a whole load
0:28
of rebreathers. Simple fact is their
0:31
reliability, their capability, their
0:34
performance at depth is unmatched.
0:37
And that's why this isn't my first sheer
0:39
water. It's the latest in a long line of
0:41
them that have kept me safe on a whole
0:43
load of deep dives. In this video, I'm
0:45
going to talk to you about my five
0:48
favorite things that I love about sheer
0:50
water computers. But first of all, I
0:52
want to talk about the difference
0:54
between the Perdict 2 bronze journey
0:56
edition and the Perdex, the original
0:59
Perdict that I've been using for the
1:01
last 8 years, I think. Now, some of
1:02
these are cosmetic, and let's be honest,
1:05
the Perdict 2 Journey Edition does look
1:08
a whole lot better than the original
1:10
Perdict.
1:11
Now, although that's nice, it's not
1:13
really what I want to focus on. What I
1:15
want to talk about is the things that
1:18
make a difference to me as a diver. And
1:20
the most important one is the
1:22
improvement to the screen. Simply, it's
1:25
noticeably brighter and noticeably
1:27
clearer than my Perex one. Now, that's
1:29
not to say that the original Perex
1:31
didn't have a great screen because it
1:33
did and it does. It's just that it's
1:35
been taken to the next level by the
1:37
Perix 2. I think that's a really
1:40
important thing because on any dive
1:42
you're going to want to get information
1:44
from a screen quickly and the brighter
1:47
and clear it is it is the less likely
1:49
you are to get it wrong. You're going to
1:51
take the information in quicker and for
1:53
people like myself who are doing long
1:55
deep dives particularly if you're under
1:57
pressure when stuff is happening that's
1:59
something that is really important and
2:01
something that I value a lot. The
2:03
Journey Edition has also got improved
2:05
battery life, and frankly, who doesn't
2:07
like that? It claims that it's got up to
2:10
60 hours, which is an awful lot of
2:12
diving, even when you do them as long as
2:14
I do. Another interesting thing is the
2:17
air integration, and that's one of those
2:19
things that people absolutely love. So,
2:22
the Perix 2 Journey Edition will allow
2:25
up to four transmitters to connect, and
2:28
that's something that I never had on my
2:30
original. I'll be honest, it's not
2:31
something that I'm particularly going to
2:33
use, but obviously there's a whole load
2:35
of people that will. The other thing
2:37
that's not on the original is the
2:39
vibration alerts, which on the Perix 2
2:42
are programmable. They're obviously a
2:45
great way of making divers aware that
2:47
there's something in their computer that
2:48
they need to look at, and they're not
2:50
quite as intrusive as audio alarms,
2:52
which can sometimes upset other divers.
2:55
So, vibration alerts, a really nice
2:57
touch and another great feature. The
3:00
last one that I want to mention is the
3:02
addition of a threeaxis tilted compass.
3:05
Does that make a huge difference? Well,
3:07
yeah. It just means it's going to be
3:08
more accurate and that's got to be a
3:10
good thing. So, if you're going to use a
3:12
compass, you want it to be accurate. So,
3:14
well done sheer water for moving that
3:16
forward. Overall, then the Perix 2
3:19
Bronze Journey Edition feels like a real
3:21
improvement and an upgrade to my
3:23
original Perex and that's why it's my
3:26
new offboard computer of choice. Having
3:28
said that, there are a whole load of
3:31
things that have remained the same, and
3:33
that's great because they're really
3:35
important features. There's a ton of
3:37
things that I could talk about, but what
3:39
I particularly want to do is talk
3:41
through five things I really like about
3:44
the sheer water, and they're things that
3:45
aren't necessarily always appreciated or
3:48
understood by everybody. So, what I'm
3:51
going to do is run through them now.
3:53
Hopefully, you'll find something of
3:54
value to you. And what I would say is if
3:56
you think there's a feature that I've
3:58
missed and I should have talked about,
3:59
then uh stick it in the comments. I'd be
4:01
really interested to hear what you like
4:03
about them. The first feature that I'm
4:06
going to cover is something that you can
4:08
do before you get in the water. And that
4:10
is dive planning. So you put all the
4:12
information that is relevant to the dive
4:15
into the sheer water and then you can
4:18
tell it to run a dive plan and it will
4:19
give you it will give you one. and it
4:21
will give you your stops, your stop
4:22
depths, uh any if you're doing open
4:24
circuit gas changes, all that kind of
4:26
stuff. And if you want to, you can
4:28
transfer that onto a dive slate and take
4:31
it in the water with you as a backup.
4:33
You can also run what if scenarios, you
4:36
know, what if this gas isn't available?
4:38
What if I change to that gas? What if I
4:39
do a bit longer or a bit deeper or
4:41
whatever it is? And you can do all of
4:43
this on the surface before you get into
4:45
water. So, that's a fantastic feature.
4:49
Well done, Sheer Water. The next one is
4:52
probably not quite as useful, but
4:54
definitely really interesting and it's
4:57
not something I think that necessarily
4:59
people are aware of. So, what it is is
5:01
that the sheer water will show you the
5:03
exact breakdown of decompression stops
5:06
that you need to do. You can see exactly
5:08
how long you are going to be at each
5:10
depth all the way back up until you get
5:13
to the surface. So, you know, that's
5:15
kind of interesting, even if not quite
5:18
as directly useful as the previous one.
5:22
Number three, though, is something that
5:24
is really important and really useful,
5:27
which is that with your sheer water, you
5:29
can change your breathing gases
5:31
underwater on the fly. So before you go
5:34
in the water, you can have five closed
5:36
circuit gases programmed and five open
5:39
circuit gases programmed. But that
5:42
doesn't really cover the scenario that
5:44
say another diver has a different
5:46
breathing gas to one of the five that
5:48
you put in and for whatever reason you
5:50
need to use their breathing gas. So what
5:53
you need to be able to do is change this
5:55
underwater and then your computer to
5:57
modify your dive plan, modify your stops
6:00
and all those kind of things. And that
6:02
is exactly what the sheer water allows
6:04
you to do. So you can sit there, you can
6:07
change your gas that you've got
6:08
programmed in and then say this is what
6:10
I'm breathing now and the sheer water
6:12
will take that and run with it. So that
6:14
is obviously super super useful. Right
6:18
on to number four then. And that is uh
6:21
gradient factors. I think most people
6:24
know that gradient factors are a way of
6:27
modifying the conservatism of the dive.
6:30
So, if you want to stay underwater and
6:33
do more decompression stops, you have a
6:35
conservative set of gradient factors. If
6:37
you want to get out the water quicker,
6:39
then you have a less conservative set of
6:41
gradient factors. Now, before you get in
6:44
the water, you will obviously program
6:45
whatever you want into the computer, and
6:48
then you're doing the dive. But let's
6:50
say something happens on the dive and
6:52
you decide you want to either be more
6:53
conservative or you want to be less
6:55
conservative. Well, the great thing is
6:57
that the sheer water allows you to
6:59
adjust the gradient factor whilst you're
7:02
actually down there. And therefore,
7:04
let's say for instance, you have bailed
7:06
out and you are concerned that you might
7:09
not have enough uh breathing gas to do
7:11
your full stops and you're willing to
7:14
accept a greater risk of decompression
7:17
illness um to mitigate the risk of
7:19
running out of diving gas. Then what you
7:22
can do is you can change the gradient
7:24
factor high from say let's say you had
7:27
it at 70 or 80. You could change it to
7:29
90 or 95 and that would get you out of
7:32
the water quickly while still or quicker
7:35
while still you know giving you an
7:37
element of uh mitigation or you know
7:40
risk control over the risk of getting
7:42
decompression illness. And the last one
7:44
is the one that you'll see me doing on
7:46
pretty much every dive, which is to
7:49
change the P2 underwater so that it can
7:52
match the P2 on my rebreather. And I use
7:55
that to accelerate my decompression.
7:58
It's another awesome feature of the
8:00
sheer water. And the great thing about
8:04
it is that the sheer water will just do
8:06
everything on the fly. So it will
8:08
calculate your decompression profile. It
8:10
will also calculate all the other stuff
8:12
that you need such as CNS and it just
8:16
presents it to you absolutely
8:18
seamlessly. So that is another super
8:21
useful feature. And I've now told you
8:24
the five things that I particularly
8:25
love, but there's a whole load of other
8:27
things and I'd be really interested to
8:29
hear from you how important those are to
8:31
you. So for instance, one thing that's
8:33
really cool is the configurable middle
8:36
row. So different people like to put on
8:38
different things on there depending on
8:40
what's relevant for their sort of
8:42
diving. Some people like to see gradient
8:44
factor 99 or the delta or whatever else
8:49
it is. But that's a that's another
8:51
fantastic feature. Other people really
8:53
like the rate of ascent indicator.
8:55
That's the yellow or red just to the
8:58
right of the current depth. There's also
9:00
that lovely thing. If you go slightly
9:02
higher than your decompression stop, it
9:04
will give you either a red or a yellow
9:07
indicator that you need to go back down
9:09
again. Another thing I think that needs
9:11
to be talked about is the app. So, you
9:13
can upload your dives from your sheer
9:16
water onto an app on your phone. It will
9:18
sync with the cloud desktop. It's a
9:20
great way of keeping your dive logs and
9:21
also allows you to interrogate them and
9:23
see all the information in there. So,
9:25
another fantastic feature. And I've not
9:28
even touched on open circuit modes.
9:30
Haven't talked about recreational mode.
9:32
Haven't talked about the technical mode.
9:34
Both of which are extremely strong and
9:36
extremely capable in their own right,
9:38
but not really something that I use very
9:40
much of. So, if you've got a favorite
9:43
feature about the sheer water, any of
9:45
the sheer water computers that you like,
9:47
then please stick it in the comments.
9:48
I'd love to hear what they are. But I
9:51
hope you've enjoyed my favorite features
9:53
of the sheer water. I mean, the simple
9:55
fact is all the sheer water range of
9:57
dive computers are really good and
9:59
strong in their own ways. But the
10:01
Journey Edition, the Perdict 2 Bronze
10:03
Journey Edition has taken that to a next
10:06
level. It's now my new offboard dive
10:08
computer of choice. You're going to be
10:10
seeing a lot more of it on my videos. If
10:12
you've enjoyed this one and you want to
10:15
watch some of my other ones, I've got a
10:16
whole load more about different types of
10:18
technical diving equipment, some tips
10:20
and tricks that work for me. Otherwise,
10:23
if you could leave us a like, drop us a
10:25
comment, use the hype system, whatever
10:27
it is, that would be absolutely
10:29
brilliant. Otherwise, I'm Dom Robinson,
10:31
Deep Wreck Diver. Hope you've enjoyed
10:34
this video, and I'll see you on the next
10:35
one.