
Do you need to be 18 years old to learn to scuba-dive? It depends on your situation. The junior certification course can be completed by young children. They can then move on to more challenging dives. Adult scuba certification is also available for teens and adults. Both courses require that you are at least 15 years of age, and that you have at least some experience. Below are the requirements for each level of certification.
You must be at least 18 to scuba dive.
The recreational scuba training council (RSTC) recommends that people under the age of 15 should not scuba dive. Children as young as 8 years old can learn to scuba dive, and receive training. Due to limited scientific research on the effects of scuba divers on children, this age requirement may not be met. Individual results will vary. Children should always be trained by a qualified instructor.
Scuba diving is not a sport that requires a minimum age. PADI is one school that trains kids as young a ten year old. Generally, kids under the age of 10 are classified as junior level divers and will be upgraded to the appropriate adult level when they reach the appropriate age. Young people can also train with the British Sub-Aqua Club, but they must be atleast 12 years old to participate in any training programs.

Physical and medical requirements
Some conditions make it more difficult to dive safely. Some chronic conditions or medications can make it difficult for someone to safely dive. Regular physical activity is essential for diving. Diving is not recommended for pregnant women. You should consult your doctor if any of these conditions are present before you attempt to scuba dive. Learn more about the medical and physical requirements to scubadive.
The Recreational Scuba Training Council in North America will require you to complete a medical questionnaire. This form can be obtained from many places. Upon completion of the questionnaire, the RSTC will determine whether the prospective diver needs to undergo a medical examination. Although they are not required to complete the questionnaire, those who answer "yes" may still be able to dive.
Courses available
To dive, you must be at minimum eight years old. The age required to dive depends on where you live. The PADI Bubblemaker program for kids can help you determine if your age is appropriate. It teaches them how to dive, including pressure and buoyancy. They can also practice their skills in the pool. During this training they can dive to as much as 12 feet.
To be a fully qualified diver, you must be eight years old. While most agencies offer courses to children as young as 8, they won't give you the certification to dive in open-water. For younger divers, PADI offers programs such as the Bubblemaker program and Seal Team. While it might not be the best for beginners, this program can give you a taste.

Certification requirements
The validity of your scuba diving certificate is never expired. However, if teaching scuba to novices or starting a business, an instructor's license will be required. Most dive centers that are reputable will want to know about your certification and diving history. A refresher course may be necessary if you haven’t dived in six or more months. You can still keep your certificate valid, but it won't expire. However, you should make sure you are up-to-date on the most recent rules and regulations.
Five types of diving knowledge is required in order to attain scuba certification. The classroom component and open-water diving are the two main components. Each dive will be a simulation of an emergency situation, wherein you'll need to be able to return to the surface quickly. This portion of your course is similar in nature to obtaining a driver's permit. For open-water diving, you must pass both knowledge and exam.