FCC rules require the use of the 506
to apply for a new or modified ship radio station license. The
FCC-506A is used by the applicant to self certify to a temporary
operating authority ship station license while the application is
being processed by the FCC. The data is used to determine
eligibility. This form may also be used for renewing a ship station
license when the renewal application (FCC form 405B) automatically
generated by the Commission is not received.