"> Sailor / Cobham 6311 MF-HF 250W
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Sailor / Cobham

6311 MF-HF 250W

Sailor / Cobham 6311 MF-HF 250W is identified in the source list as a GMDSS mf/hf radio. It is normally installed on the bridge, radio station or designated communications area with the antennas, power supplies and backup arrangements required for the vessel's GMDSS installation. Its purpose is to support maritime distress, safety and operational communications using the communications service indicated by the equipment category. The existing database record provides no additional model-specific operating figure beyond the listed designation and category. The exact frequency coverage, satellite service, DSC capability, antenna arrangement and regulatory approval depend on the installed model. The exact model designation identifies communication service, interfaces and approved functions; these must be confirmed from the radio survey records and manufacturer documentation.

Components & Design

Component data being added…

Technical Data

dsc True
imo compliant True

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Common failures & inspection points

●Antenna, feeder or tuning fault caused by corrosion, damaged cabling or poor connections, resulting in weak transmission, reception problems or equipment alarms
●Power-supply or backup-battery failure caused by charger defects, aged batteries or wiring faults, resulting in loss of availability when main power is removed
●Transmitter or receiver failure caused by RF-component or electronic faults, resulting in inability to establish communications or receive expected traffic
●Position or time-input failure caused by GNSS or network faults, resulting in missing or incorrect data in distress or DSC functions
●Control, display or software fault caused by hardware failure or configuration problems, resulting in frozen controls, error messages or unavailable functions

Service & Maintenance

Perform operational and self-tests permitted by the vessel's procedures without generating unintended distress alerts. Inspect antennas, feeders, grounding, power supplies, backup batteries and connected navigation-data inputs. Verify station identity, position input, time and configured communication services against approved records. Check printers, handsets, microphones and alarm interfaces where fitted. Maintain software, licenses and service subscriptions required by the installed system. Refer to manufacturer and regulatory documentation for exact test methods, battery criteria and approved servicing.

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Replacement Parts

Keep fuses, handset or microphone accessories, printer consumables where applicable, selected power-supply components and manufacturer-recommended electronic spares. Antenna or feeder repair materials and backup-battery arrangements should reflect the vessel's redundancy plan. Preserve type approval and programmed identity when replacing core units.
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Equipment Model #131035 · ✓ still in production