An English merchant seaman, developed the first self-contained diving gear that used compressed oxygen and not compressed air.

This kind of snorkel has the most basic part, the solid tube and the mouthpiece. Sometimes, this can be bent to a specific shape.

This helps prevent the mask from fogging up

Cushions and protects the nose. Some masks have the purge valve, a little flap valve located at the bottom of nose pocket that helps in removing the water has entered the masks.

A soft flexible material that seats the mask around the face.

This prevents splashed water and spray from easily entering the tube.

He built the “diving engine,” which was an underwater oak cylinder supplied with compressed air from the surface.

The width of the boat and is measured at the widest part of the canoe or kayak.

The sides curve outward (flares out) making the beam wider.

They provide the the necessary locomotion to propel effortlessly in the water.