FOREWORDThank you for purchasing this Icom radio. The IC-M90 VHF MA-RINE TRANSCEIVER is designed and built with Icom’s stateof the art technology and craftsmanship. With proper care thisproduct should provide you with years of trouble-free operation.IMPORTANTREAD ALL INSTRUCTIONS carefully and com-pletely before using the transceiver.SAVE THIS INSTRUCTION MANUAL—Thisinstruction manual contains important operating instructionsfor the IC-M90.EXPLICIT DEFINITIONSFEATURES☞ Submersible constructionBuilt tough to withstand the punishing marine environ-ment, the transceiver’s submersible construction meetsIPX7* requirements for waterproof protection (1 meter;3.3 ft depth for 30 min.).In addition to, the speaker grill adopts a new structurewhich drains water or seawater easily.* Only when the battery pack and fl exible antenna are attached.☞ Dualwatch and tri-watch functionsConvenient functions which allow you to monitor the dis-tress channel (Ch 16) while receiving one other channelof your choice (dualwatch), or while receiving one otherchannel of your choice and the call channle (Ch 09) (tri-watch). See p. 14 for details.☞ Large, easy-to-read LCDWith dimensions of 19(H) × 35(W) mm; 3 ⁄ 4 (H) × 1 3 ⁄ 8 (W)inch, the transceiver’s function display is easy to read andshows operating conditions at a glance. Backlighting andcontrast can be adjusted to suit your preferences.☞ Simple operation6 large buttons on the front panel provide user-friendlyoperation. The independent volume and channel buttonsare located on the front panel for convenient one-handedoperation.iiiWORD DEFINITIONRWARNINGCAUTIONNOTEPersonal injury, fire hazard or electric shockmay occur.If disregarded, inconvenience only. No riskof personal injury, fire or electric shock.Equipment damage may occur.