I am not disagreeing with that statement as I am not an SSI instructor but if what you say is correct, then you guys really need to update your website.
SSI :: SSI Scuba Schools International :: take your dive @ diveSSI.com
According to those guys all you need to do is be a 'Dive guide' and be certified 'science of diving' (what ever that is) and the prereqs for dive guide do not say anything about Master Diver. Maybe 'science of diving' requires Master Diver-I don't know.
Dive Guide Prerequisite
Minimum age: 18 Years
Certification: AOWD and Stress&Rescue
minimum dives: 50
The Science of Diving is an SSI course designed to teach Dive Professional the advanced physiology that accompanies diving and diving injuries. It is in place because, whether unfortunate or not, there are not too many people who are taking Tech Diving courses before they become Instructors. This leaves them with somewhat limited knowledge on the effects of diving on the human body.
Sure we all got the basic run down in OW class, but this expands on that and teaches (as far as I can tell) the physiological part of Tech Diving. As in the way the body responds to different atmospheres and pressures. The different physiological responses that occur while diving and how to easily recognize distress, uncomfortableness (sp?), and how best to deal with those at depth.
This is kind of a bridge between diver Stress and Rescue and "Dive Professional Stress and Rescue" yet goes more in to detail on the why and how of the stress portion. If that makes any sense.