Halcyon Multifunction Compensator, Owner'S Manual

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doesn’t pinch between your arm and chest. Do the same with
your left. If either D-ring pinches, adjust it upwards.
The waist D-ring is used for clipping off the SPG and for stage
bottles. To position the waist D-ring, run your left thumb
straight down your left side until it hits the waist strap. Your
thumb should intersect the D-ring, very close to your hip bone.
The position might need to be adjusted after your first dive
with your MC system. In water, practice clipping/unclipping
the SPG and, if you wear stage bottles, have your buddy check
the position of the tanks. You do not want the waist D-ring
positioned so far back that you can’t comfortably clip or unclip
your SPG, nor so far forward that a buoyant stage would become
a hindrance or cause excessive drag.
The rear crotch D-ring is generally used for storing gear that is
not used very often, such as reels or lift bags. This D-ring needs
to be low enough that you can clip/unclip gear there (and not be
blocked by the bottom of the tanks), yet high enough that the
gear does not hang down too far. Typically, position the rear
D-ring one hand-width down from the bottom of the backplate
(Figure 7).
The front crotch D-ring is only used with a tow-behind scooter.
Gear should never be clipped to this D-ring, as it will hang in the
slipstream and pose significant entanglement hazards.
Fig. 7: Rear D-ring placement
Final Assembly of your MC System
When using an Pioneer single cylinder wing, the MC’s
backplate mounts directly to a scuba cylinder with two cam
straps that thread through both the backplate and the buoyancy
wing (Figure 8). When used with an Eclipse series single
cylinder wing, attach either the Halcyon stainless steel or
weighted Single Tank Adapter to the wing with the two supplied
bolts (Figure 9). With either wing, slide the cam straps over
your cylinder and tighten at desired position in relation to the
cylinder’s valve (Figure 10).
When diving with doubles, the backplate is bolted to the
cylinders with an Explorer buoyancy wing sandwiched between
the backplate and cylinders. The bolts on the cylinder bands
thread through the two grommets on the wing (Figure 11).
Fig. 8: Cam straps threaded through
Pioneer wing and backplate