For Dive Shop Sales
Call 03 5985 1700

Tech Diving







The Scuba Doctor is the leading source for equipment for advanced and technical divers. We have supplied thousands of experienced tech and rebreather divers worldwide with quality scuba diving equipment from the finest manufacturers.

Tech Tip:
Blame Normalisation of Deviance, Not "Complacency"

Every year experienced divers die in diving related avoidable accidents that should not have happened because the victim was "always so careful". One of the more common examples is a failure to analyse gas before diving, but there are many different types of avoidable accidents. The usual explanation put forward is a lapse in following their training, typically as a result of complacency. The victim is blamed for becoming complacent, the dive community is again reminded to be vigilant against complacency, and then another avoidable accident occurs. Perhaps a different way of explaining the cause of these predictable accidents could help effect a change in this unfortunate cycle.

The concept of Normalisation of Deviance has been used to describe the cause of NASA's flawed decisions that led to the Challenger space shuttle disaster. Normalisation of deviance from dive safety begins when the diver has a lapse in one or more safety protocols (often as a result of time and/or financial pressures) and nothing bad happens. The lapse reoccurs without incident and slowly the diver grows more accustomed to the deviant behaviour. Eventually the diver becomes so accustomed to a deviation from dive safety standards that they consider their unsafe behaviour to be acceptably normal. Ultimately one or more safety protocols are permanently deleted from their routine; enabling the diver have a serious, perhaps fatal, accident. To other divers, the accident is bewildering because the behaviour seems obviously unsafe and the victim had enough training and certainly enough experience to "know better".

It's clearly not productive to keep blaming the victim for these avoidable accidents. We can't solve this complex problem in a Tech Tip but a step to addressing this dive safety issue is to begin a discussion within the dive training community. Do we need a different educational approach that formally recognises and addresses normalisation of deviance as an underlying cause of many avoidable accidents among experienced divers? If you are an experienced diver, or dive professional, The Scuba Doctor urges you to raise awareness of this issue among your peers.

New Products For July - Tech Diving

Sonar HP 7/16" Male to Four 7/16" Female UNF Adapter

Sonar HP 7/16" Male to Four 7/16" Female UNF Adapter
$73.00  $53.00
Save: $20.00 (27%)

Featured Products - Tech Diving

Suunto DX Watch Dive Computer - Black Titanium with Transmitter

Suunto DX Watch Dive Computer - Black Titanium with Transmitter
$2,150.00  $1,929.00
Save: $221.00 (10%)
Dive Perfect DIN to Yoke 1st Stage Regulator Adapter

Dive Perfect DIN to Yoke 1st Stage Regulator Adapter
$73.00  $53.00
Save: $20.00 (27%)
IST Proline Mini Tank O-ring Kit with Brass Pick

IST Proline Mini Tank O-ring Kit with Brass Pick
$20.00  $15.00
Save: $5.00 (25%)

Cressi Master Ellipse T10-SC Regulator Set

Cressi Master Ellipse T10-SC Regulator Set
$849.00  $719.00
Save: $130.00 (15%)
IST Sports Silicone Grease / Mask Seal - 60g Tub

IST Sports Silicone Grease / Mask Seal - 60g Tub
$18.00  $14.00
Save: $4.00 (22%)
Suunto DX Watch Dive Computer - Silver Elastomer + Transmitter

Suunto DX Watch Dive Computer - Silver Elastomer + Transmitter
$1,650.00  $1,485.00
Save: $165.00 (10%)

Suunto D6i Novo Watch Dive Computer with USB Cable

Suunto D6i Novo Watch Dive Computer with USB Cable
$1,200.00  $1,079.00
Save: $121.00 (10%)
Suunto D6i Novo Zulu Watch Dive Computer w/USB and Transmitter

Suunto D6i Novo Zulu Watch Dive Computer w/USB and Transmitter
$1,400.00  $1,259.00
Save: $141.00 (10%)
Suunto EON Steel Wrist Dive Computer w/USB and Tank Pod

Suunto EON Steel Wrist Dive Computer w/USB and Tank Pod
$1,750.00  $1,575.00
Save: $175.00 (10%)

Monthly Specials For July

OMS Line Arrow

OMS Line Arrow
$2.00  $1.50
Save: $0.50 (25%)
Apollo AV-2 Evolution Scooter DPV with LiFePO Battery

Apollo AV-2 Evolution Scooter DPV with LiFePO Battery
$4,950.00  $4,399.00
Save: $551.00 (11%)
Sonar Black Surgical Tubing - Small (per metre)

Sonar Black Surgical Tubing - Small (per metre)
$12.00  $9.00
Save: $3.00 (25%)

Sonar Assembly Screws - Metal (2PC)

Sonar Assembly Screws - Metal (2PC)
$18.00  $15.00
Save: $3.00 (17%)
Divesoft Analyser He/O2 Blender Max Set

Divesoft Analyser He/O2 Blender Max Set
$1,570.00  $1,490.00
Save: $80.00 (5%)

XS Scuba EZ QD Adapter

XS Scuba EZ QD Adapter
$51.00  $44.00
Save: $7.00 (14%)
Sonar Black Surgical Tubing - Large (per metre)

Sonar Black Surgical Tubing - Large (per metre)
$14.00  $10.50
Save: $3.50 (25%)

Comodo SSL Certificate