Azimuth Rebreather Basic Chassis and Overview
The basic chassis of the
Azimuth is a simple injection-molded plastic case, formed to hold the cylinders,
scrubber, and counterlungs. To that basic platform is attached all of the other
components. Let's take a look and see how it all fits together:
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Here's a
not-too-clear photo of the rig standing on my bench. Note the key word: Standing.
Yup, *finally* a rebreather that can stand up on it's own feet, so to
speak. You only need to have dealt with another rebreather that's
impossible to rack with twinsets on the dive-boat to realize how useful a
rig can be when it can be handled like any other technical diving system. |
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Here's why it stands:
The manufacturer has seen fit to install a neat spring-loaded stand on the
bottom of the rig. It must be pulled out to extend it (as I am doing with
my free hand while managing the camera with the other), and then the rig
stands-up. |
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Yet, when the diver
begins to stand-up after dressing into the rig, the feet spring-back into
a retracted position for diving. This is a good human-factors design, and
deserves attention by other manufacturers. I wish my Mark-15 had this sort
of system installed! |
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Here's the view from
the back, still standing on the bench. Notice the two cylinders across the
bottom of the rig, and the substantial carrying handle-cum-ballast weight
across the top. Notice also the integrated wings for buoyancy control. |
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Another view of the
front, showing the carry-handle at top, and the integration of the bailout
regulator and wings. |
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This shot shows the
very cleanly streamlined shape of the shell of the rig, which really fits
the divers back wonderfully. Guys, this is one clean design. No snarl of
hoses or other snagging hazards. Dreager Dolphin users, eat your hearts
out. |
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A ton of attention
has been made to keeping hose-runs neat, and streamlining every part of
the system. Here, the 2 HP gauge hoses and the feed-hose for the wings can
be seen exiting the shell at the left shoulder. Notice also that, for once,
the main breathing hoses actually come towards and over the divers
shoulders, not straight out of the top of the rig. As can be seen, the
carrying handle also serves as the hinge-point for opening up the top part
of the shell. |
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OK, I promise I'll
stop bragging about the handle, but I REALLY like it. It's heavy enough to
retrieve an unconscious diver into a boat. It's comfortable to grip. And
when you grab it in one hand and the folding foot in the other, the rig is
easy to carry to the boat or down the beach. Have I said "I like it"
enough time? If not, let me say that I LIKE IT..... That little round
thing in the middle of the back is the exhaust valve. That component in
itself is worth it's own page, which is why it *does* have it's own page.
Go see it when you are done here. |
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Regulators are, no
surprise, Mares MR-12 with Nitrox fittings installed. This is a real
advantage over the Dolphin, as Mares first-stage parts are common
worldwide and the regulators are very easy to service. Since the original
Voit MR-12 was a US made design, and since the same internal parts fit
many of the first stages of it's era (US Divers Conshelf, among others),
and since the current Mares equipment still uses these same components,
fixing these in some hellhole backwater part of the world will be easy. |
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Here's another
detail of the regulator. It's obvious from a legal standpoint to use the
Nitrox fitting, but I must point out that replacement valves with a
standard DIN outlet are available, and that the actual first-stage can
have a DIN fitting added to replace the Nitrox one. I guess the question
is, "why bother", but I'm just mentioning it since I know that
somebody will ask. |
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Cylinders are Faber
4 liter steel ones, with a 200 BAR working pressure. Valves are the
standard European Nitrox outlet. The cylinders are now US DOT
approved, so local filling is not an issue for US users. |
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Once again, the
manufacturer chose to use a valve with the same internal parts as are used
on just about every SCUBA supply valve made since the 1950's. The valve
seat and other components are interchangeable with US Divers, Scubapro,
OMS, and the rest. Easy to field service, and an excellent touch. |
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The real core of the
rig is the constant mass flow dose unit and manifold, which is attached to
the harness at the belt. This device has it's own page, so go there when
you are done here for a detailed look. |
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Laying on it's back,
we can see the excellent integrated harness, the folded foot, and the
bailout regulator and gauges. Enough D-Rings are present on the harness
for attachment of the usual stuff, but not so many that you end up looking
like a caricature of a technical diver. Bottom line is that it's just
right. The harness is a cummerbund design with good quality fasteners, and
double leg-straps similar to a parachute harness are designed to keep the
rig positioned low on the back so the centroid of the counterlungs is in a
position for low work of breathing, |
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Even though it's NOT
a "Mares Azimuth" any longer, the association will last forever.
All of the other system components are of Mares manufacture. Shown are the
2 HP gauges, the bailout regulator, and the wings inflator. All top of the
line stuff, and easy to service at the local dive shop. |
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Little details
abound: They decided to include a version of a HP gauge with a thermometer
into one of the two gauges. Essential? Nope. Nice? Yup! Just detail
oriented. I like that approach! |
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Once again, no off-brand
junk is installed. This is the bailout regulator. |
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To open the shell,
just unthread the webbing from the buckles and hinge it open. At first I
thought this to be a low-tech approach, but I got used to it, and found
that it works well. Simple = good, and this is simple. |
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Opening up the shell
reveals the scrubber , exhaust valve, and counterlungs. These are shown on
their own pages. |
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Suffice it to say
that when the scrubber and counterlungs are removed (no tools, and 30
seconds), this is what's left. This is viewed from the top-down, with the
open shell lid hinged towards the camera, and the stowage area for the
cylinders at the top of the photo. |
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A parting view of
the whole mess. That's the yellow bailout regulator hose exiting the rig
right where it belongs, at the top right shoulder. Once again, you can see
the very streamlined and clean design. |
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