RWD Introductory Diving
Introductory Diving is best choice for the first-timer and does not require previous diving experience. If you are able to swim, you can usually dive. An Introductory dive does not get you a qualification you can use later on. It is a one time experience to see if you enjoy the sensation, or because your time does not allow for anything longer than one day.
To do an "Introductory Dive" you still need to be able to perform a few basic skills and go over a few major points.
The dive begins with a dry briefing either on board a vessel or beside the pool. Sometimes there is a video to watch and a quick quiz to complete. Afterwards you do a couple of skills in the water followed by a short shallow dive either in safe surrounds of a pool or in a safe shallow section of the reef. Your dive takes you as deep as 3-10 metres (depending on the package that you will avail). The Instructor is by your side the whole time and will even hold your hand if you feel the need.
The information is from www.rwdiving.com