iFOREWORDThank you for purchasing this Icom transceiver. The IC-M603 vhf marine transceiver is designed and built withIcom’s state of the art technology and craftsmanship. Withproper care, this transceiver should provide you with yearsof trouble-free operation.We want to take a couple of moments of your time to thankyou for making the IC-M603 your radio of choice, and hopeyou agree with Icom’s philosophy of “technology first.” Manyhours of research and development went into the design ofyour IC-M603.D FEATURES❍ Built-in DSC meets ITU Class D requirement❍ Rugged waterproof construction❍ Large LCD with dot matrix characters❍ Front and rear panel microphone connection❍ Optional COMMANDMICIII™ (HM-162E) areavailable and up to two COMMANDMICIII™scan be connected❍ Easy to make individual DSC calls using Icom'sMA-500TR Class B AIS TransponderIMPORTANTREAD ALL INSTRUCTIONS carefully and completelybefore using the transceiver.SAVE THIS INSTRUCTION MANUAL — This in-struction manual contains important operating instructionsfor the IC-M603.EXPLICIT DEFINITIONSCLEAN THE TRANSCEIVER AND MICROPHONETHOROUGHLY WITH FRESH WATER after exposure towater including salt, otherwise, the keys and switch maybecome inoperable due to salt crystallization.WORD DEFINITIONR WARNING! Personal injury, fire hazard or electricshock may occur.CAUTION Equipment damage may occur.NOTE Recommended for optimum use. No riskof personal injury, fire or electric shock.