How long does a Seabreacher last?
The Seabreacher is only meant to dive just beneath the surface for brief durations. You typically do not go lower than 5-6 feet, and it will also depend on your level of experience as a pilot. Most people are under for about 5-10 seconds at a time, and almost always have a portion of the snorkel above the waterline. Time limits. The time a person can safely stay underwater depends on many factors, including energy consumption, number of prior breaths, physical condition, and age. An average person can last between one and three minutes before falling unconscious and around ten minutes before dying.
Are seabreachers legal?
Legally, yes. Is it a submarine? Kind of . Is it legal for a civilian to own a full size submarine? Sure. You can build and operate as large as a submarine as you can afford. It would not be legal to in the US to operate it as a warship and obtain weapons for it, as those weapons would not be legal.