The cost will be approximately from $200 to $500 inclusive of the course and actual diving component. The Professional Association of Diving Instructors offers an online segment of the training which should cost the trainee around $100. This will cover instructions but not the scuba diving trips in open waters. Prices fluctuate primarily because of the open water certification which can be as high as $500 or even more. There are diving shops that give packages of $200 to $350 for three dives.
1 Narcolepsy is caused by the loss of the two brain chemicals called hypocretins. 2  Researchers have identified a gene that is linked to narcolepsy.  The main symptoms of narcolepsy are excessive daytime sleepiness and abnormal rapid eye movement (REM) sleep.
The sleep expert: Dr Neil Stanley. You may have narcolepsy. It causes sufferers to fall asleep at inappropriate times, and excessive daytime sleepiness is a classic sign. Sufferers often experience disturbed sleep at night, which may exacerbate dreams and sleepwalking, both of which you experience.