The Scuba Tune-up Guidebook provides a time-effective way to brush up on dive safety, planning and technique information that is broadly accepted by the dive community. If you have been away from diving for sometime, this guidebook can help you refresh your diving knowledge and bring you up to date. You will find it a useful tool whether you are a less experienced diver returning after a layoff, or a very experienced diver who feels a bit rusty.
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