Can the radio direction finder apparatus (RDFA) be removed once GMDSS equipment is installed?
No, since the RDFA is required for navigation (SOLAS V) as well as distress (SOLAS IV) purposes. However, as a result of discussions between the USCG and FCC, the FCC will grant RDFA SOLAS waivers to GMDSS-equipped vessels that carry GPS or similar radionavigation equipment. The FCC does not have legislative authority to waive RDFA carriage on Communications Act-regulated vessels.