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Definition of "Authorised Frequency" |
Frequency in the maritime mobile service, the frequencies 457.525 MHz, 457.550 MHz, 457.575 MHz, 467.525 MHz, 467.550 MHz and 467.575 MHz may be used by on-board communication stations. In case the equipment operates at a channel spacing of 12.5 kHz the following additional frequencies may be used: 457.5375 MHz, 457.5625 MHz, 467.5375 MHz and 467.5625 MHz. / Duplexer is a device that allows bi-directional,duplex communication over a single path. |
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