As I understood there was mud layer that prevented the divers to navigate near the bottom (no way to tie a string as to anchor point to not get lost in zero visibility, no way to feel where the bottom is, etc.). But not so much mud that only the narrow passage was left.
> And as said in the beginning of the interview, they feared the kids would be dead any day
They would be dead if they did not find them on the last day, as it was considered to stop the search. Once the kids were found and supplied with food they had enough time to plan, prepare, rehease, re-check and execute the rescue.
As I understood there was mud layer that prevented the divers to navigate near the bottom (no way to tie a string as to anchor point to not get lost in zero visibility, no way to feel where the bottom is, etc.). But not so much mud that only the narrow passage was left.
> And as said in the beginning of the interview, they feared the kids would be dead any day
They would be dead if they did not find them on the last day, as it was considered to stop the search. Once the kids were found and supplied with food they had enough time to plan, prepare, rehease, re-check and execute the rescue.