Welcome to Mark & Charlene's Scuba 'N' Tech Diving

At Mark & Charlene's Scuba 'N' Tech Diving you will be offered course with TDI, SDI & ERDI.

We will travel around Asia to help you develop and extend your diving knowledge courses available from novice diver to Instructor and IT Staff Instructor.  Our courses are available in Singapore, Malaysia, China & Hong Kong and can be taught in English and Cantonese.

You will be opened up to a whole new world where life is rich, wild, and abundant; you'll experience the underwater surrounding, understand and respect nature, and interact with the most unpredictable forces of marine life.

You'll appreciate each precious diving experience at Mark & Charlene's, and on top of that, you'll come to meet people  from all walks of life, who share the same passion.


A brief history of TDI, SDI & ERDI 

From its humble beginning in 1994 to today, the group of training agencies known as Scuba Diving International (SDI), Technical Diving International (TDI), and Emergency Response Diving International (ERDI) form one of the largest certification agencies in the world. With offices servicing more than 100 countries, the company today far exceeds the original vision the founders had when they conceived the idea on a napkin, sitting at the kitchen table many years ago.

As with many companies, the original concept for the business was an outgrowth of the recognition that a niche needed to be filled. This niche was providing specialized training for what the industry now calls technical diving, and the founders did so by forming the first agency of the group, Technical Diving International, in 1994.

Technical Diving International was one of the first agencies of its kind. It focuses on providing training materials and education in special areas ranging from Nitrox to Closed Circuit Rebreathers, along with overhead environments such as Cave and Wreck diving. TDI also provides training in the preparation of gas mixtures for dives up to 100 meters (330 feet).

During TDI’s development, there were a few key things that separated it from its competitors and pioneered the way many divers learn to dive today. For one, TDI was at the forefront of the movement that convinced the dive industry to accept technical diving activities. In the early stages of technical diving there were many industry professionals who felt the average diver was not smart enough to handle the expanded dive planning that goes into doing a technical dive, and that technical diving was far too risky for non-professionals. These two factors were offset at TDI by an extensive education process conducted through seminars, publications, and TDI’s training materials. The average diver realized that the risk in technical diving could be brought to an acceptable level and they were indeed smart enough to conduct technical dives. Today, the industry not only embraces technical diving, but Nitrox is now the largest specialty course taken worldwide.

Another key event in TDI’s history occurred when it became the first agency to pioneer the use of Semi Closed Rebreathers by recreational divers. This opened the door to allow divers to use Closed Circuit Rebreathers recreationally and spawned a whole new segment of the dive industry. In short, TDI ushered in an exciting breakthrough in the dive industry that many believe actually prevented the industry from further decline.

In 1998 the membership of TDI could no longer be held back from their demands for creation of a sport diving division of TDI and thus was born Scuba Diving International (SDI). The primary reason for this expansion was that dive instructors enjoyed dealing with an agency that listened to the instructors in the field and created programs that were, and continue to be, very profitable because they are tailored to the way today’s diver wants to learn to dive.

Like TDI, SDI did a number of things that separated it from previously established training agencies. One example is that SDI was the first agency to require the use of personal dive computers by all divers during every dive. This new standard was put in place because dive computers were and are used daily by all diving professionals to make diving safer and more enjoyable. Research showed that the average diver forgot how to use dive tables soon after completion of a course. This fact, along with the advancement and increased reliability of dive computers, meant they were considered a safer alternative to dive tables. SDI recognized this and although dive tables are not required curriculum in the basic diver course, they still can be taught during any course.

Another ground breaking step taken by SDI was the development of an e-learning platform for dive education. Allowing a student to learn the academic portion of a dive course online rather than requiring additional classroom instruction was a bold yet visionary step. Currently SDI is one of only a few agencies that offer divers the opportunity to learn online and is the only organization to offer continuing education courses.

With the membership now happy about their options for both sport and technical dive training through SDI and TDI, they continued to ask for more specialized training in public safety, and thus Emergency Response Diving International (ERDI) was born in 2000. ERDI was and continues to be the only training program that is supported by a major certification agency catering exclusively to public safety diving. Throughout the years ERDI has written programs that have trained very established dive teams such as the Chicago Fire Department, numerous state police dive teams, and also several federal agencies.

In 2004, with 10 years of development into the company, the founders of SDI/TDI/ERDI decided it was time to move on and sold the company to a group of investors who quickly expanded the offerings of the company. Immediate changes included applying for and receiving acceptance into the Recreational Scuba Training Council (RSTC) and the European Underwater Federation (EUF). This acceptance was critical because it meant that SDI standards were evaluated and found to be sound and safe by its competitors. SDI passed with ease and today is currently actively involved in both organizations, helping make the sport safer for more divers. Other changes came with additional staff and a commitment to embrace electronic technologies to make doing business easier for members.

Although SDI/TDI/ERDI is considered to be one of the newer organizations in the industry, it is viewed as one of the most professional and progressive certification agencies. SDI/TDI/ERDI’s history and its reputation as an innovator have built a strong foundation for the future. By listening to its members and building programs that are profitable and keep risk at an acceptable level, the future is bright for the organization.