Knowing how to swim is not a binary knowledge, like and On-Off switch.
There are lots of swimming styles, there are grades of speed, resistance, endurance, etc.
Generally, people says that they don't know to swim when they cannot float, or stay in the water with the head over the surface without touching the bottom and without any flotation device.
For OWD the requirements are very little. The student should be able to float and move, I mean, the student should be comfortable in the water without any gear.
It also depends on the instructor, the dive school and the agency.
In my case, certified with SSI, the dive school was several steps further of the minimun requirements and they wanted us to swim breast and free style for at least 5 minutes each in the pool every single pool session and in the pool final exam.
Now I've just certified Stress & Rescue. The swimming requirements are even stronger.
There are lots of swimming styles, there are grades of speed, resistance, endurance, etc.
Generally, people says that they don't know to swim when they cannot float, or stay in the water with the head over the surface without touching the bottom and without any flotation device.
For OWD the requirements are very little. The student should be able to float and move, I mean, the student should be comfortable in the water without any gear.
It also depends on the instructor, the dive school and the agency.
In my case, certified with SSI, the dive school was several steps further of the minimun requirements and they wanted us to swim breast and free style for at least 5 minutes each in the pool every single pool session and in the pool final exam.
Now I've just certified Stress & Rescue. The swimming requirements are even stronger.