Meehan, et al. Determining best practice for technical assessment of hookah surface supply diving equipment during diving fatality investigation
Appendix 1. Hookah accident data collection checklist
|
Name of deceased: Age: |
|
Training and experience: |
|
Time and Date of incident: (24hr : yyyy/mm/dd) |
|
Location of incident: |
|
Location of equipment: |
|
Date of inspection of equipment: |
|
Equipment inspected by other agencies: Y N |
|
If above Y, inspected by whom: |
|
Equipment photographed by other agencies: Y N |
|
If above Y, photographed by whom: |
|
Equipment photographed by other agencies: Y N |
|
If above Y, photographed by whom: |
|
Weather Conditions: |
|
Wind Direction at time of incident (if known): |
|
Air Inlet upwind / downwind of compressor unit: |
|
Hookah location at time of incident: Boat Flotation device Land |
|
Surface type compressor was located on (if on land) |
|
Clearance space around compressor (m): |
|
Hookah Brand: |
|
Serial Number: |
|
Description of complete system from air intake to diver(s) regulator(s): |
|
|
General overview of complete hookah system
|
Condition: |
Good |
Fair |
Poor |
Notes/Observations |
|
Air Intake Filter |
|
|
|
|
|
Air Intake
|
|
|
|
|
|
Compressor |
|
|
|
|
|
Linkage between motor and compressor (e.g., belt) |
|
|
|
|
|
Compressor motor |
|
|
|
|
|
Exhaust
|
|
|
|
|
|
Air Reserve Tank including volume |
|
|
|
|
|
Supply Hose
|
|
|
|
|
|
Hose attachments to compressor |
|
|
|
|
|
Regulator and attachment to diver
|
|
|
|
|
|
Harness/Vest |
|
|
|
|
|
Weight belt or vest |
|
|
|
|
|
Compressor Brand / Model No. |
|
Compressor motor type: Petrol Diesel Electric |
|
Engine type: 2 STROKE / 4 STROKE |
|
Fuel level: |
|
Compressed gas output: AIR NITROX |
|
Stated output in litres per minute / cubic feet per minute (CFPM): |
|
Stated line pressure (bar): |
|
Presence of a governor: |
|
Last documented service date: |
|
Inspection / Maintenance Log available: Y N |
|
Owner air test result available: Y N |
|
If Y, results: |
|
Air delivery system: Diaphragm Piston |
|
Pressure relief valve: Functioning? Y / N Setting (bar): |
|
Oil filter: Oil level: |
|
Lubricant type for internal parts (air side): |
|
Condensation drain condition: Water present in drain: Y / N |
|
Site of air hose connections relative to compressor: To reserve tank: Direct connection to compressor: |
|
Length of air intake (m): |
|
Horizontal distance of intake from compressor (m): |
|
Height of intake above compressor (m): |
|
Air intake free of obstructing debris? Y / N |
|
Air intake free of damage? Y / N |
|
Filter present at intake: Condition of filter: |
|
Filter type: Date of last change (if known): |
|
Connection type to compressor: Bayonet? Y / N |
|
Condition of exhaust port: |
|
Distance from air inlet (m): |
Air Reserve Tank
|
Storage Capacity (L): |
|
Integrated into frame of compressor or separate stand-alone unit: |
|
Construction material: Stainless Steel / Aluminium / Other (please specify): |
|
Water trap: Y / N |
|
Particle filter: Y / N Rated to (µm): |
|
Location of particle filter: Between compressor and reserve tank Between reserve tank and diver |
|
Type of particle filter: Macro particle / Carbon filter / Other (e.g. Hopcalite) |
|
Air redundancy? Yes, via surface cylinder Yes, with diver No |
Air Supply Hose
|
No. of hoses: |
|
No. of connections directly to compressor: |
|
Hose brand: |
|
Colour of hose: |
|
Condition of hose: |
|
Any visible damage / scuffs? |
|
Can hose be kinked? |
|
Length of hose (m): Internal Diameter of hose (mm): |
|
Non return valve: Present Absent |
Regulator
|
Hookah specific regulator: Y / N |
|
Modified SCUBA regulator: Y / N |
|
Brand / Model no: |
|
Condition of regulator including mouthpiece and exhalation valves: |
|
Cracking pressure of regulator: |
|
Accessory air supply: Spare Air / Octopus + Cylinder / None |
Harness / Weight Belt
|
Air Test Kit Product: |
|||
| Maximum (ppm) | Recorded (ppm) | Remarks: | |
|
Carbon Dioxide |
PASS / FAIL | ||
|
Carbon Monoxide |
PASS / FAIL | ||
|
Water Vapour |
PASS / FAIL | ||
|
Oil in air |
PASS / FAIL | ||
|
Odour |
PASS / FAIL | ||
|
Oxygen concentration (%) |
|||
|
Tested volume output of the hookah apparatus (l/min) |
|
|
Volume of reserve air tanks (l) |
|
|
(A) Maximum flow at hookah air outlet source |
|
|
(B) Maximum flow (l/min) at delivery point to regulator (1) |
|
|
(C) Maximum flow (l/min) at delivery point to regulator (2) |
|
|
Does (B) + (C) equal measurement (A) or is output flow reduced? |
|
|
Hose configuration: Is there a “Y” or “T” configuration which creates more than one air supply hose from a single outlet at the hookah apparatus? |
|
| Can steal of air be demonstrated if one regulator free flows at a shallow depth? – breathing pressure test | |
|
Driving pressure test: Differential pressure readings between surface and end of air supply hose (psi) |
0m: 5m: 10m: 15m: |
|
Time to depletion of air supply in event of compressor failure or purge of second line. |
|