They could also communicate on the underwater telephone, but would only do so in a case of extreme emergency.

Tom moved over to the underwater telephone and picked up the handset.

Patricia turned on the underwater telephone and set it to ping every minute.

We've got the Gertrude, the underwater telephone, but that's no good for this.

One lesson the Chinese had learned during their training was not to communicate over underwater telephone.

He broke his silence, using his underwater telephone to tell them to stop, but he was too late.

As he concluded the supplication he heard Sims calling for him to man the underwater telephone.

He couldn't, because the underwater telephone couldn't reach that far and made too much noise.

An underwater telephone sometimes called Gertrude is also used to communicate with submersibles.

Both Wood and Chambers decided not to use their underwater telephones to communicate.