Dark blue signifies the atmosphere and the flashes and globe are symbolic of the unit's worldwide communication capability.

A concentrator usually provides communication capability between many low-speed, usually asynchronous channels and one or more high-speed, usually synchronous channels.

Each vendor product typically offers communication capability for programming, maintaining and collecting data from their products.

Procedures to test this communication capability generally mirror those of the organization itself.

Surface-supplied diving equipment usually includes communication capability with the surface, which adds to the safety and efficiency of the working diver.