Lesson 3


1. It is very important before assembly a regulator check the condition of______________
2. Always have a keeper on _________________ side of the weightbelt from the buckle.
3. The mask headstrap must
4. It is advisable to ________________ before entering the water.
5. The water pressure on the eardrum must be balanced by internal pressure so that it is not damaged. It is necessary to compensate ______________________, without waiting to feel the pain
6. The speed at which sound travels through water makes it difficult for his senses to judge _______________
7. If we want to dive, ________________________, the B.C.D. must be deflated by using the exhaust valve.
8. The ascent starts finning towards the surface, in order to control the speed; the B.C.D. must be ________________.

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