You can also probably just get your cert through SDI, even though you went through the PADI course. Of course, you might want to email Fred, at GBS, and ask him. He's very friendly and I'm sure he can help you figure it out. I wouldn't think you're the first person to try to do this.
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Conducting Open-Water Training
for Non-SDI Referral Students
Follow these procedures if:
You are an SDI Instructor in current, teaching status, employed by a professional dive center.
The students with whom you will be working are being referred to you by a non-SDI dive center and/or instructor.
Procedures
If the agency under whom the students received their academic and confined-water training will allow the referring dive center/instructor to issue that agencys certification card, even though it is you who conducts the actual open-water training dives, then simply follow the referring agencys standards and procedures. Otherwise, you can issue the students an SDI Open Water Diver card by following these procedures:
Have the referral students complete the same SDI waiver/release and medical forms appearing on the SDI Student Folder that you require of your own entry-level students.
You are to ensure that students have been trained in the proper use of dive computers and have each student wear his or her own personal dive computer on all training dives.
You are to witness each of the students completing all of the dives and performs all of the skills required by SDI Standards. Record this information on the Student Folder and have students initial it.
When the students have completed their four open-water training dives and performed the required skills to your satisfaction, complete and send an SDI Student Registration form to SDI Headquarters. Be sure to include the name of the referring instructor so that his or her name can appear on the students certification cards as well.
SDI also requires that you make a copy of the referral letters which accompanied each student and file them in the students folders. SDI recommends that if students come with Universal Referral forms, you not only issue SDI certification cards but also sign the Universal Referral forms and give them back to the students, so that the forms may go back to their original instructor/dive center.
http://www.tdisdi.com/sdi/global/index.html
