What type of amateur station simultaneously retransmits the signal of another amateur station on a different channel or channels?

A repeater station is specifically designed to listen for an incoming signal on one frequency and simultaneously retransmit it on a different frequency. This allows low-power stations, such as handheld transceivers, to communicate over much greater distances by leveraging the repeater's high-elevation antenna and higher transmit power. The other options serve completely different purposes in amateur radio. A beacon station transmits one-way signals strictly for observing radio propagation or testing antennas. A remote control station is used to operate another radio station from a distance, and a message forwarding station typically handles digital store-and-forward traffic rather than simultaneous live retransmission.