47 C.F.R. § 80.1177 Assignment and use of frequencies.
Title 47 - Telecommunication
On-board frequencies are assignable only to ship stations. When an on-board repeater is used, paired frequencies must be used. On-board repeater frequencies must be used for single frequency simplex operations. On-board frequencies are listed in subpart H.
Title 47: Telecommunication
PART 80—STATIONS IN THE MARITIME SERVICES
Subpart X—Voluntary Radio Installations
On-Board Communications
§ 80.1177 Assignment and use of frequencies.