Specifications

4. Make sure the microphone element is less than 1/4” from the diver’s lips (unless

using the LAR V Adapter or other rebreather adapter).

5. Ensure all batteries are charged before starting the dive operation.

6. Before the divers enter the water, check to make sure they have not covered the

transducer with any type of dive gear.

7. Make sure all wires are dressed to avoid snags while diving.

8. Designate one diver as the lead communication diver so both divers will not be

trying to answer questions.

9. Brief divers that after entering the water, especially if making a jump, they

should make eye contact with the dive supervisor and establish communications

(assuming you have a surface station).

10. In initial training, talk to only one diver at a time until he establishes clear

communications. After the divers are comfortable, have the divers talk to each

other (assuming you have a surface station).

11. It is a good idea for everyone to agree on Channel A or B before the dive starts

and to ensure everyone is on that channel.

12. If you feel a thermocline, report the depth to other divers and topside. Topside

should adjust the transducer depth accordingly.

13. If you are using an SW-1000-SC (or related transceiver) with a Super Mic

microphone, and especially if your mask is a KMDSI M-48 SuperMask

you may experience intermittent transmission, resulting in broken speech

communication. If this problem occurs, do the following:

• Intercom volume: If the transceiver is a MAG-1004HS and will be used

in through-water mode only, turn down the intercom volume to reduce or

eliminate the diver breathing noise. However, if intercom communications

are needed, the intercom volume will need to be adjusted appropriately.

• Squelch settings: The factory setting for the squelch is based on the Hot-

Mic’s frequency response, which differs from the Super Mic’s response

in the M-48 mask. Adjusting the squelch to a higher sensitivity level will

most likely maintain activation of the receiver squelch during diver speech

(although more ambient noise may be heard through the receiver).

• Microphone position: To ensure loud and consistent speech, grab the push-to-

talk (PTT) assembly and bend it so you feel the microphone against the corner

of your mouth. A rebreather does not have enough room to accommodate

both the Super Mic

and the bite mouthpiece inside the M-48’s mask

cavity. To allow the maximum amount of speech to enter the microphone,

resulting in the loudest and clearest speech possible through the intercom

or through-water system, reposition the microphone against the corner of

your mouth every time you spit out the bite mouthpiece. When reinserting

the bite mouthpiece, gently move the PTT assembly toward your neck such

that the microphone is positioned at the corner of your mouth.