11.1.1 The purpose of this Chapter is to provide
minimum requirements for distress and safety radiocommunications between
mobile offshore drilling units and coast stations, ships and supporting
aircraft in the Maritime Mobile Service.
11.1.2 The requirements are applicable to the
following modes of operation of mobile offshore drilling units:
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.1 when underway self-propelled;
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.2 when towed, or self-propelled and accompanied
by escort ships; and
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.3 when stationary at the site or engaged in drilling
operations.