7.1.1 One-man submersible atmospheric diving suits shall be fitted with suitable equipment
                                 as is necessary for the submersible suit to communicate with its parent craft when
                                 on the surface and when submerged. Equipment using through water communication
                                 methods shall have a minimum range of twice the maximum operating depth of the suit
                                 under the expected operational conditions.
                              
                              
                              
                            
                           
                           
                           
                              
                              
                              7.1.2 Where main communications are transmitted through the umbilical, emergency through
                                 water means of communication shall also be provided.