For surface supplied diving , the view of the water is usually still necessary , and a view of the line tenders handling the umbilicals is also required , .
There is live video feed from the divers and two - way audio communications with the tenders .
For surface supplied diving , the view of the water is usually still necessary , and a view of the line tenders handling the umbilicals is also required , unless there is live video feed from the divers and two - way audio communications with the tenders .