Raymarine Ray230 Owner's Handbook Manual page 15

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Exclusive Features of the RAY230 US Version
• Built-in DSC in accordance with standard SC-101
• Exclusive circuit that automatically selects 16 or 9 as the Priority Channel
when the radio is turned on
• Dedicated key for changing the Priority Channel (16/9)
• Exclusive weather alert feature (when in monitor mode)
Exclusive Features of the RAY230E European Version
• ETSI compliant full Class D DSC
• ATIS
• Up to 10 Private Channels
• Multi-call operation
General Description