Skip to main content

Table 2 Crude rates of mishaps in the written, memorized, and no-checklist group participants

From: Mishaps and unsafe conditions in recreational scuba diving and pre-dive checklist use: a prospective cohort study

  No. of mishaps Crude rates per 100 dives
  Written checklist
(59 dives)
Memorized checklist
(623 dives)
No checklist
(158 dives)
Major mishaps 94 5.1 11.9 10.8
Rapid ascent 37 0.0 4.8 4.4
Lost buddy contact 22 3.4 2.7 1.6
Entanglement/ entrapment 9 0.0 1.1 1.3
Low to out of air 9 0.0 1.1 1.3
Free Ascent 8 0.0 1.1 0.6
Spontaneous inflation 5 0.0 0.8 0.0
Buddy breathing 2 1.7 0.0 0.6
2nd stage regulator malfunction 2 0.0 0.2 0.6
Content hose rupture 0 0.0 0.0 0.0
Free flowing 2nd stage 0 0.0 0.0 0.0
Minor mishaps 153 13.6 18.0 20.9
Changed buoyancy due to dive suit 29 3.4 3.0 5.1
Equalization problems 26 0.0 3.2 3.8
Mask squeeze 23 0.0 2.7 3.8
Mask flooded/ Dislodged/ Panic 17 1.7 2.4 0.6
O-ring problem 9 3.4 0.8 1.3
Buddy mismatch 7 1.7 0.8 0.6
Unable to clear mask 6 0.0 0.6 1.3
Fins lost/ loose/ dislodged 6 0.0 0.8 0.6
Safety Stop missed 6 0.0 0.8 0.6
Leaking BCD 6 1.7 0.8 0.0
Air used frequently to maintain buoyancy 5 0.0 0.3 1.9
Air not turned on/ not fully on 3 0.0 0.5 0.0
Computer stopped working 3 1.7 0.3 0.0
Weights belt/ weights dropped 2 0.0 0.3 0.0
Fins strap broke 2 0.0 0.2 0.6
Multiple ascents 2 0.0 0.3 0.0
Octopus reg snagged 1 0.0 0.0 0.6
Unable to release weights 0 0.0 0.0 0.0
Mask strap broke 0 0.0 0.0 0.0
All mishaps 247 18.6 29.9 31.6