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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

Summary of Contents for Multifunction Compensator

Page 1: ...1 Halcyon Multifunction Compensator Owner s Manual ...

Page 2: ...2 ...

Page 3: ...the user A CAUTION indicates any situation or technique that could cause damage to the product and could subsequently result in injury to the user WARNING This manual provides essential instructions for the proper fitting adjustment inspection and care of your new Multifunction Compensator Because Halcyon s MCs utilize patented technology it is very important to take the time to read these instruc...

Page 4: ...ontinue venting air to slow your ascent rate if neutral buoyancy cannot be reestablished In an emergency such as an out of air situation or uncontrolled descent it is important to remove and jettison weight immediately DO NOT depend solely on using your MC s power inflator to lift you to the surface DO NOT inhale from your oral inflator The MC may contain harmful contaminants or gasses which could...

Page 5: ...e proximity with them at all times Do not depend on any flotation device to hold your face above the surface in the event that you are rendered unconscious in the water while diving WARNING Although this manual provides some basic guidelines for certain buoyancy control techniques it is not a substitute for training from a professional diving instructor Failure to weight yourself properly may crea...

Page 6: ...tor 9 Harness Accessory Placement 9 Mounting on a SCUBA Cylinder 10 MC Storage Pak Lift Devices 12 Weighting your Multifunction Compensator 13 Fixed Ballast 13 Active Control Ballast 13 Matching Wing and Cylinder 14 Attaching the ACB System 15 Using the ACB System 15 Pre dive MC System Inspection 16 MC System Care and Maintenance 17 Appendix 1 MC System Component Checklist 18 Appendix 2 Halcyon Wa...

Page 7: ...th the same thermal protection that you will use with your MC If you plan to dive with a drysuit make sure to include all undergarments In addition to the thickness of the drysuit a full set of thermal undergarments can add considerable bulk and have a dramatic impact on the sizing of the harness You can adjust the Halcyon MC harness without the use of special tools by adjusting the triglide fastn...

Page 8: ... be comfortable and allow you to reach your tanks The waist belt should fit as snug as is comfortable Do not overtighten the waist belt so much as to restrict breathing When adjusting the waist belt make sure to set the buckle so that it is off to your right side With the buckle in this position the crotch strap is unable to accidentally open the buckle The waist belt buckle and or another buckle ...

Page 9: ...to fine tune the position of the five D rings The shoulder D rings should be positioned relatively high on the shoulder straps especially if you plan to utilize stage bottles in your diving If the D rings are too low the stage bottles will hang too far away from your body causing significant drag and possibly damaging marine environments The shoulder D rings should also be high enough to allow for...

Page 10: ...ks 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...

Page 11: ...nder were to slip free from the MC while you are diving you may lose your air supply which could lead to serious injury or death WARNING Halcyon MC buoyancy wings are specifically designed for either single or dou ble cylinders Always use the appropriate wing for the designated cylinder type s Failure to use the appropriate amount of lift for a given cylinder configuration can result in nega tive ...

Page 12: ...the bolt snap with your left hand and then pull down and to the left Figures 13 16 Once the device has cleared the Pak it can be inflated using the low pressure hose from your MC inflator or by using a low pressure hose connected to a separate air source such as a dry suit inflator Figure 17 The MC Storage Pak also provides additional padding on single cylinder dives Alternative lift devices inclu...

Page 13: ...o allow divers a range of weighting options to achieve proper balance these options include the Active Control Ballast ACB system Figures 18 19 canister lights v weights placed beneath the back plate on doubles weighted single tank adapters backplates in stainless or aluminum Halcyon Trim Weights placed on the back of a single tank and or the use of a traditional weight belt For example a Pioneer ...

Page 14: ...Weight Kit Fig 20 Weighted and standard Single Tank Adapters Halcyon s Pioneer single cylinder wings come in 27 lb 12 kg 36 lb 16 kg and 45 lb 20 kg lift sizes With the appropriate balanced rig the Pioneer 27 and 36 wings along with the Eclipse 30 lb 13 6 kg wing are designed for light to medium weight aluminum and steel single cylinders the Pioneer 45 and Eclipse 40 18 kg lift are appropriate for...

Page 15: ... weight pocket should be pointing to the front of you 4 The left pocket is then threaded onto the left side waist strap with the handle facing the front of you 5 The first grommet hole closest to each pocket will line up with a corresponding hole in the back plate Use one of the two supplied fasteners to attach the tail to the backplate Do this on both sides 6 Replace the buckle on the left waist ...

Page 16: ...remain taut and fully inflated 3 Check the function of the oral inflator button rapid exhaust valve and overpressure manual dump valve to ensure a rapid and unobstructed exhaust from each valve Listen closely for any leak age with the wing fully inflated but not connected to a low pressure air source If there is any suspi cion of leak submerge and once equalized to depth check for continued bubbli...

Page 17: ...Halcyon MC system is 20 celsius 4 fahren heit to 70 celsius 158 fahrenheit All prudent known safeguards and procedures should be observed when diving in near or sub freezing temperatures on the surface and below Post dive Maintenance To prevent permanent damage from corrosion salt crystals or chlorine attack thoroughly rinse the MC inside and out with fresh water after every day of use using the f...

Page 18: ...PV Lift Bag 185 lb 84 kg Closed Circuit with OPV Secure Harness Accessories Stainless Steel Backplate Harness Knife Pocket with adj crotch strap Hardcoated Aluminum Backplate Harness Knife Pocket with adj crotch strap Right hand Zippered Pocket attaches to harness strap Stainless Knife for Halcyon Harness Knife Pocket Ballast Systems Active Control Ballast 20 Integrated Weight Pockets 10 lb 4 5 kg...

Page 19: ...ITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED IN DURATION TO A PERIOD ENDING ONE YEAR FROM THE DATE OF PURCHASE Some states in the U S and certain foreign countries do not allow limitations on the duration of implied warran ties so this may not apply to you This warranty gives you specific legal rights You may have rights which vary from state to st...

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