IC-M423G and IC-M400BB Fixed Marine VHF radios, Back by Popular Demand The IC-M423GE (formerly the IC-M423G) and the IC-M400BBE (formerly the IC-M400BB) slot back into Icom’s fixed marine VHF line up. Both models are almost identical to their predecessors except that they now feature an integrated GPS and an external GPS antenna to meet the [...]