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.