MK4 MANUAL
28Pages

JUMP JACKET MK4 THE JUMP JACKET Mk4 INTRODUCTION The Jump Jacket Mk.4 has been designed to be used in the commercial diving industry, specifically for surface air and mixed gas diving, to allow the diver total control of his buoyancy. The emphasis has been heavily placed on safety and efficiency, allowing the diver greater flexibility under water without drawing on emergency energy levels. Expanding on the safety features of the MK.3 Jacket, the general concept is to give the diver more control of his buoyancy and expand his options in an emergency situation. GENERAL DESCRIPTION ...

JUMP JACKET MK4 INSTRUCTIONS FOR OPERATION AND USE 1. 1.1 DONNING The Jump Jacket is designed to be worn as a single unit without the need for any other harnesses. With the jacket and bailout supported, the diver steps into the continuous loop leg straps and then passes his arms through the waistcoat jacket. Ensure that the primary lifting D ring is accessible between the diver’s shoulder blades. The waist, chest and leg straps can now be adjusted for a comfortable fit. 1.2 GAS SUPPLY The Jump Jacket Mk4. has four independent gas supplies available: 1.2.1 1.2.2 SECONDARY GAS SUPPLY...

JUMP JACKET MK4 INSTRUCTIONS FOR OPERATION AND USE (cont.) 1.2 GAS SUPPLY (continued) 1.2.4 DIVER TO DIVER (UMBILICAL CROSS CONNECT) The umbilical cross connect is used in an emergency situation and allows two divers to buddy breathe from one umbilical gas supply. This is achieved by disconnecting the quick connect fitting from the jacket supply valve of one diver, disconnect the quick connect fitting on the second diver’s helmet and connecting in the first diver’s jacket supply hose to the second diver’s helmet. (See Fig. 1) ...

JUMP JACKET MK4 INSTRUCTIONS FOR OPERATION AND USE (cont.) 2. OPERATION 2.1 BUOYANCY CONTROL The Jump Jacket offers a maximum buoyancy of 22.72kg. Control of jacket buoyancy is achieved by a combination of the diver injecting gas from his chosen gas supply and dumping gas via either dump valve. Choice of gas supply would be dependent on the diving set­up and the situation that the diver finds himself in. As gas is injected, the diver should grasp one of the two dump cord toggles, situated on either shoulder of the jacket. By operating the gas supply and dump ...

JUMP JACKET MK4 INSTRUCTIONS FOR OPERATION AND USE (cont.) A second lift point is provided by means of two harness extensions, positioned inside the front wings of the jacket and can be pulled together to form a front lifting point. (See Fig. 3) Fig.2 Fig.3 The harness has two umbilical D ring positions and diver rigging D rings on the leg straps. For safety reasons the leg straps are permanently fitted through the roller/adjuster buckles, forming permanent loops that the diver will have to step into when dressing. ...

JUMP JACKET MK4 INSTRUCTIONS FOR OPERATION AND USE (cont.) 3. DIVER RECOVERY The Mk4 Jump Jacket has been designed to assist in the recovery of an injured, unconscious, or trapped diver. 3.1 DIVER RECOVERY (UNCONSCIOUS DIVER) The use of the Mk.4 Jump Jacket to assist in an emergency diver recovery as been greatly advanced. The ability to float an unconscious diver back to a diving bell or recovery basket has proven to be a major safety feature. The bellman/standby diver is able to use the unconscious diver's Jump Jacket to lift ...

JUMP JACKET MK4 INSTRUCTIONS FOR OPERATION AND USE (cont.) a. b. Disconnect the quick connect fitting from the Recovery Diver’s inflation valve to his jacket (See Right) c. Pull out the extended inflation hose from the Recovery Diver’s jacket pouch and connect the jacket inflation hose into the Trapped Diver's helmet side­block quick­connect fitting. The Trapped Diver is now breathing from the Recovery Diver’s main umbilical gas supply. d. The Trapped Diver's main umbilical can now be cut to allow his recovery back to the bell. N.B. 4. The Recovery Diver would disconnect...

JUMP JACKET MK4 INSTRUCTIONS FOR OPERATION AND USE (cont.) Time must be allowed during a course of operational dives for those divers who are new to the Jump Jacket to explore the versatility of the jacket at their own pace. Each diver will experience a different learning curve before building up enough confidence to use the jacket to its full potential. 4.2 TRAINING (TECHNICIAN) Equipment Technicians should be fully trained on all aspects of the Jump Jacket and be able to implement a full service and maintenance program. ...

JUMP JACKET MK4 MAINTENANCE AND COMPONENTS 5. GENERAL A regular maintenance program should be followed to ensure reliability of the jacket through its working life. It is recommended that the jacket be taken out of service and visually inspected for damage or wear approximately every 10­ 15 dives or in conjunction with the diving helmet maintenance program. The jacket can be hand washed in a mild soap water solution. A porosity test should be carried out to confirm integrity of the inner bladder and valves. All valves ...

JUMP JACKET MK4 MAINTENANCE AND COMPONENTS (cont.) 5.1 OUTER JACKET FRONT Adjustable Shoulder Buckle AP5 Knob Secondary gas supply via Pneumo valve JJ1 Main gas supply via helmet Swagelok Snap Connector Waistband adjustment JJH/1 Harness JJH BACK AP5 Exhaust Valves Helmet Straps Inflator Hose from KMB. 17bk helmet BK15, BK16, BK17 Version June 2008 11

MAINTENANCE AND COMPONENTS (cont.)

MAINTENANCE AND COMPONENTS (cont.) A.B.H.Harness (Jump Jacket) Medium D.Bar Largest D.Bar Medium D.Bar Right side shown finished with Five folds JUMP JACKET

JUMP JACKET MK4 MAINTENANCE AND COMPONENTS (cont.) 5.5 DUMP/PRESSURE RELIEF VALVES These valves are dismantled by unscrewing the top cover of the valve body while firmly gripping the valve­retaining collar inside the jacket. This will now reveal the damper diaphragm and mushroom valve. Wash out with fresh water, ensuring no grit or debris is left behind. To remove the valve­retaining collar complete, push it fully into the bladder and rotate through ninety degrees and withdraw it side­ways through the bladder opening. ...