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