Snorkels
Snorkel Size and Dead Air Space
The ideal snorkel is about 3/4 of an inch in diameter and between 12 and 14 inches long.
If a snorkel is too narrow, breathing resistance increases. It would feel similar to breathing through a straw. It must also be long enough to not fill with water while on the surface.
Snorkels can be too large as well. A snorkel contains dead air space, which is exhaled air you rebreathe when you inhale. The wider or longer the snorkel is, the more dead air you must inhale with every breath.
Snorkels that are too long are awkward to wear and may become entangled while diving. Additionally, the excess length increases your drag while underwater, which makes it more difficult to swim.
If a snorkel is too narrow, breathing resistance increases. It would feel similar to breathing through a straw. It must also be long enough to not fill with water while on the surface.
Snorkels can be too large as well. A snorkel contains dead air space, which is exhaled air you rebreathe when you inhale. The wider or longer the snorkel is, the more dead air you must inhale with every breath.
Snorkels that are too long are awkward to wear and may become entangled while diving. Additionally, the excess length increases your drag while underwater, which makes it more difficult to swim.
