Your Details (all information above the line will be removed from any data provided to third parties)

Please tick here if this is an update (i.e. you have already filled in this survey before

Your Name

Your email Address This is so I can contact you to clarify details if required

Experience

Years Diving experience OC and CC Open Circuit and Closed Circuit (use ~ for approximate)

Years CC experience (use ~ for approximate)

Number of dives total OC and CC (use ~ for approximate)

Number of dives CC (use ~ for approximate)

Year started diving Rebreathers (use ~ for approximate)

Main Rebreather dived Inspiration Azimuth Evolution Megladon Prism Cis-Lunar Dolphin KISS Self Build Other if other please detail

Second Rebreather dived Inspiration none Azimuth Evolution Megladon Prism Cis-Lunar Dolphin KISS Self Build Other if other please detail

Training

Trainer('s)

Training Agency IANTD IART SSI ANDI TDI Self Taught Other     if other please specify

How old are you

Gender Male Female

Highest Open Circuit Qualifications none Open Water / Ocean diver AOW Rescue Diver / Sports Diver Dive Master / Dive leader Advanced Diver (BSAC) First Class Diver (BSAC) Instructor

Open Circuit Gas Usage Air Nitrix (Basic) Nitrox (Advanced) Normoxic Trimix Trimix

Highest Rebreather Qualifications None Basic Rebreather Diver Normoxic Trimix Full Trimix Instructor (Level 1) Instructor (Level 2) Instructor (Level 3)

Why did you swap to Closed circuit

Modifications    Tick if yes

Have you modified your unit

if so what and why?

Have you a separate independent O2 sensor fitted VR3, oxygauge, HUD etc

Equipment Failures        Tick those that you have experienced. Please use common sense as different units have different features and failure modes

Cell Warning pre dive, during dive

Cell Failure pre dive, during dive

Handset/Electronics Cracked/Broken

Handset/Electronics Flooded

Molex connector or other wiring fault

Loop flood during dive , why

Injection Solenoid stuck open pre dive, during dive

Injection Solenoid stuck closed pre dive, during dive

Scrubber Breakthrough , Scrubber breakthrough time

Diluent or Oxygen injector problems

Dump Valve problems

Mouthpiece O ring unseated

Mouthpiece flapper valve inverted

Oxygen side hose or fixture leak

Diluent side hose or fixture leak

Have you ever had a major Hypoxia event Low Oxygen (ie unconscious)

Have you ever had a minor Hypoxia event (ie felt funny, PO2 < 16 etc)

Have you ever had a major Hyperoxia event High Oxygen (ie fits)

Have you ever had a minor Hyperoxia event (ie twitches, PO2 > 2)

Have you ever had a major Hypercapnia event Scrubber CO2 breakthrough (ie Unconscious or incapacitated)

Have you ever had a minor Hypercapnia event (ie headache, drowsy, temp stick warning)

Brand specific failures and questions

Other failures (Please detail) 

Have you ever had a disagreement in measured PO2 between your unit and an independent PO2 monitor of over 0.1 PO2

Did you ever suffer from a major equipment failure on Open circuit

User Failure    Tick if yes, and please be honest

Have you ever entered the water with the unit turned off

Have you ever entered the water with the Oxygen turned off (Or main gas if diving an SCR)

Have you ever entered the water with the Diluent turned off

Have you ever entered the water with a known cell warning

Have you ever entered the water with a known cell  failure

Have you ever entered the water without doing a pre-dive check

Have you ever entered the water without doing a full 2 minute pre-breathe

Have you ever entered the water without doing any pre-breathe

Have you ever continued a dive after a cell warning (other than to finish a deco obligation)

Have you ever continued a dive after a cell failure (other than to finish a deco obligation)

Have you ever continued a dive with another unit failure (other than to finish a deco obligation)

Operational      Tick for yes

Which diluents do you use Air , Normoxic Trimix , Hypoxic Trimix , Heliair , Heliox

Do you switch diluents on ascent If so what is your normal practice Heliox to trimx Heliox to Air Heloix to nitrox Trimix to nitrox Trimix to air trimix to heliox Other

Do you monitor battery voltage and if so at what voltage do you change the batteries

Bailout Deep Dive: I always carry it Minimal I carry a reserve rebreather Our team shares bailout

Bailout Shallow Dive: I always carry it Minimal I carry a reserve rebreather Our team shares bailout

Do you use a Full Face Mask if so which one

Do you have a BOV, OC/DSV (open circuit / closed circuit selectable valve)

How often do you Calibrate your Primary  Every Dive Every Day Weekly Monthly When it needs it , Secondary Every Dive Every Day Weekly Monthly When it needs it

Do you check your calibration and if so how

O2 Sensor Cells normally used R22-2BUD APD10 PSR-11-39-MD Other R22D , if other please specify

How do you change them One at a time All at once

At what interval do you change your O2 sensors

Scrubber material normally used Sofnolime 1 - 2.5 mm Medisorb Spherasorb 3.0-4.0 mm Draegersorb Sofnolime (other grade) Other , if other please specify

What's the maximum duration you rate your scrubber for and what water temperature do you normally dive in

Scrubber refill strategy  Use it all up Refill every dive Re-use if shallow/easy

Do you do a bubble check near the surface on descent

Do you raise PO2 above the set point near the surface on descent if so why

Do you raise PO2 above the set point during the bottom phase of the dive if so why

Do you raise PO2 above the set point during the 6m stop on ascent if so why

What PO2 set point do you use for the bulk of your dive

Do you use a low set point for descent and if so what

Do you use pure O2 when ascending above 6m

Do you ever dive solo on OC , do you ever dive solo on CC

Do you practice "Same Ocean" buddy diving

Maximum Depth you have dived to using the Rebreather Please indicate if m or feet

What is your average dive depth Please indicate if m or feet

How many dives did you do on the Rebreather during the last year

What is the longest single dive you have done on the unit

What is you average dive length

How do you monitor/deco during a dive Tables Vision Rebreathers own software VR2 Cochran Dive Rite Nitek 3 Suunto Uwatec Abyss Explorer VR3 Nexus Other computer , please specify which tables, software or computer you use

Which software/tables do you use to Plan your dives in advance Voyager ZPlan HLPlanner CDM-18 Proplanner VR3 V-Planner VPM-B GAP pDeco GUE; DecoPlanner DDPlan Abyss Other other

Have you ever had a bend and if so how many of each type   Joint 1 2 3 4 5 or more     CNS 1 2 3 4 5 or more     other

Have you ever had a vestibular bend

Thank you for your time.