33 U.S.C. § 1204 : US Code - Section 1204: Radiotelephone for exclusive use of master, person in charge, or pilot; frequency listening watch; portable radiotelephone equipment

Search 33 U.S.C. § 1204 : US Code - Section 1204: Radiotelephone for exclusive use of master, person in charge, or pilot; frequency listening watch; portable radiotelephone equipment

The radiotelephone required by this chapter is for the exclusive
use of the master or person in charge of the vessel, or the person
designated by the master or person in charge to pilot or direct the
movement of the vessel, who shall maintain a listening watch on the
designated frequency. Nothing contained herein shall be interpreted
as precluding the use of portable radiotelephone equipment to
satisfy the requirements of this chapter.