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The medical statement of the "Recreational Scuba Training Council", with a questionnaire for people who want to dive, and guidelines for the physician conducting the examination. 
For safe scuba diving clear communication is required. In this PDF file you find pictures of the "industry standard" hand signals, with explanations. 
The Netwriting Masters Course, written by Ken Evoy, is an intensive course on building high value content. For those who want to build their own information websites. 
This course was written for those of you who want to start a home-based web-design business. The course will help you to avoid common mistakes and problems. For most files you will need Adobe Reader. You can download it here for free. 
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