Paragraph 6 Communications
Submersible craft shall be fitted with such equipment as is necessary for the submersible craft 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 craft.
Autonomous submersible craft shall be fitted with:—
such main and reserve equipment as is necessary for the submersible craft to communicate with its support base;
such equipment as is necessary for the submersible craft, when on the surface, to alert by radio other shipping in the vicinity in the event of distress and to communicate with such shipping;
such equipment as is necessary for the submersible craft, when submerged, to communicate with surface craft. The equipment should have a minimum range of twice the operating depth of the craft.
Where the submersible craft has more than one manned compartment equipment shall be fitted to provide communication between these compartments.