VHF marine radio. 1W, 25W, PLL.
RT2048 and DSC
The RT2048 has only support for DSC with the RM2042 DSC receiver connected
to the VHF radio. This was supported from SN 448756 and above! Below this
serial number, the RT2048 must have a mod that replaced the CPU with a
newer version. (See Technical News no. 2, feb 1994).