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4.3
HELPFUL HINTS
These guidelines are provided to help you understand how best to use the
MK-III 3-Diver Intercom.
1. Before diving operations begin, check to ensure the microphone,
earphone, and wiring connections are secure and operating properly.
Ninety percent of all problems in underwater communications are due
to a connection problem.
2. If you will use battery power, always check the battery power level
before the dive, and recharge the battery if necessary.
3. Secure the MK-III if using it on a vessel that is rolling about. Strain-
relieve the umbilical(s) (diver intercom cables) so they will not pull
on the MK-III.
4. Ensure the umbilicals are dressed out so as not to trip anyone.
5. When talking to divers, keep in mind they have many things happen-
ing while underwater. It is best to get the diver's attention before giv-
ing him a message (e.g., "Red Diver, Red Diver, this is Topside, come
in Red Diver"). The diver should then respond to inform you that he is
listening (e.g., "Topside, this is Red Diver, go ahead").
6. Avoid excessive tender-to-diver volume. Most of the time, when there
is too much volume, the diver will hear distortion and ask for more
volume.
7. Speak slowly in one brief, continuous sentence. Speaking in short sen-
tences gives divers a chance to take a breath and still receive a clear
message.
8. When communicating with divers, it is a good idea to have the divers
repeat your messages to ensure they understood what you said. Also,
repeat what you heard the divers say to ensure everyone is communi-
cating accurately.
9. If this is the first time anyone on your team is using underwater com-
munications, the team should get together to talk about the system.
Practice alternative communications in the event the communications
system fails to function.
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REV. A
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