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• Keep the hand-held microphone as dry as possible. It is not waterproof.
• Place the SP-100D where it can be heard easily. If working on a boat, locate a
place where you can secure the unit where boat action will not cause it to fall.
Also remember to dress the transducer cable in such a way that divers and/or
topside personnel will not trip over it.
• If this is the first time you or any other member of your team is using communi-
cations, we recommend that your team get together to talk about the system.
Plan alternative communications in the event something is not working. A pool
session or practice in another controlled environment is the best preparation.
• Talking and listening while diving is something that takes practice and will im-
prove every time a team works together. The U.S. Navy has found that profi-
ciency at through-water communications requires about three dives. Do not be
discouraged when you first start using underwater communications.
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