On which side of the mask should snorkels be positioned to avoid interfering with the regulator?

The optimal placement of snorkels on the left side of the mask is crucial in ensuring that they do not interfere with the regulator, which is typically positioned on the right side of the diver's mouth. By placing the snorkel on the left, it allows for a clear path for breathing and reduces the chance of the snorkel getting tangled or dislodged when the diver is using the regulator. This configuration also allows for a more seamless transition between using the snorkel while surface swimming and switching to the regulator when descending or diving. Thus, positioning the snorkel on the left is essential for maintaining efficient and safe diving practices.