What is built into masks to help equalize the pressure in ears and sinuses?

1. Nose Pockets built into masks are used for equalizing pressure in the ears and sinuses.
2. The fin that is best suited for you will depend upon your physical size, leg strength, environmental conditions and most of all comfort and fit.
3. Water absorbs body heat twenty-five times faster than air.
4. The amount of lead weight you will need will vary bases on a number of things including the type, size and buoyancy of the suit you are using.
5. Most recreational diving is done in temperatures between about 50 through 80 degrees F (10-27 degrees C). Coverage and thickness preferences come into play at ware and cold extremes of this range, but it is generally agreed that full wet suits should be worn from 65 to 80 degrees F (18-24 degrees C).
6. A good fit is one of the most important considerations when choosing a wet suit.
7. You may want to consider using a dry suit in waters below 65 degrees F (16 C).
8. The acronym S.C.U.B.A. stands for self-contained underwater breathing apparatus.
9. Empty cylinders will affect your buoyancy more than full, because there is a greater weight difference between a full an empty cylinder.
10. Circle the correct combination b) A=99/39, B=29.4/2, C=1/3, D=1x
11. There is no excuse for running out of air. Divers are equipped with a submersible pressure gauge to monitor their air supply.
12. Using a computer provides the diver with many advantages over conventional analog gauges and dive tables.
13. The compass helps the diver maintain a sense of direction when natural navigation is not possible due to lack of distinct underwater features or low visibility.
14. When using the manual control button, extend the inflator hose to the highest point in order to get the greatest efficiency in deflation.
15. Diver's Luggage is often the most important piece of equipment when it comes to the protection of your Total Diving System.
16. The two kinds of flags used are the recreational diver's flag and the alpha flag, or the international "diver down" flag.
17. Many live-aboard dive boats and dive boat operators now require that each diver have and use inflatable surface markers so that they can be more easily seen on the surface for pickup after the dive.
18. When traveling it is recommended to carry an extra mask and extra high and low pressure hoses.
19. In the U.S. a cylinder must be hydrostatically tested every five years and visually inspected every year.
20. Work with you local SSI Dealer and Instructor in determining your needs, and acquire your own equipment as soon as you can.