[beagle]

Como radio de respeto no está nada mal... Pero tengo mis serias dudas acerca de la homologación de esta radio. Por lo que he estado viendo sólo tiene el botón "distress" no tienen ningún botón "DSC"... Si no me equivoco esto la enmarca en la clase C que, aparentemente, no está reconocida por la ITU. Así que tengo mis serias dudas acerca de la homologación de este producto. Quizás su sucesor...

De todas formas como radio de respeto no está nada mal... y el precio con el que ha salido al mercado hace pensar que en breve tendremos una VHF con DSC clase D a un precio asequible.

Classes of Digital Selective Calling

The DSC protocol is defined by ITU-R (CCIR) Recommendation M.493-9, adopted and now available from the International Telecommunications Union in Geneva, Switzerland. DSC operation is defined by ITU-R Recommendation M.541-8.


Class A:

All DSC options provided. Required on MF/HF radios used by SOLAS-regulated ships. Class A includes polling and vessel tracking, data and telex connection in addition to voice, and optional means for canceling a distress alert.


Class B:


Required on VHF and MF radios used by SOLAS-regulated ships. Class B required capabilities include:

• Distress call
• All-ships call
• Individual station call
  
• Semi-automatic/automatic service call
  
• Use of distress, urgency, safety and routine priorities
  
• Nature of distress
  
• Distress coordinates
  
• Time for last (distress) position update
  
• Type of subsequent communications
  
• Distress relay
  
• Distress acknowledgment
  
• Test call (for MF/HF only)
  
• Radio frequency or channel
  
• Display
  
• Receive geographical area calls
  
• Alarm
  
• Optional means for canceling a distress alert

Class C:


Only capable of transmitting a distress alert. No longer recognized by the ITU. CAUTION: The U.S. Coast Guard does NOT recommend purchase or use of a radio having this class of DSC.


Class D:


Minimum DSC capability for VHF marine radios carried by recreational boaters, commercial fishing vessels, and other non-SOLAS regulated vessels. Class D required capabilities include:

• Distress call
  
• All-ships call
  
• Individual station call
  
• Use of distress, urgency, safety and routine priorities
  
• Nature of distress
  
• Distress coordinates
  
• Time for last (distress) position update
  
• Type of subsequent communications
  
• Radio VHF channel
  
• Display
  
• Receive distress relay and distress acknowledgment calls
  
• Alarm
  

Class E:


Minimum DSC capability for HF marine radios carried by recreational boaters, commercial fishing vessels, and other non-SOLAS regulated vessels. Class E required capabilities include:

• Distress call
  
• All-ships call
  
• Individual station call
  
• Use of distress, urgency, safety and routine priorities
  
• Nature of distress
  
• Distress coordinates
  
• Time for last (distress) position update
  
• Type of subsequent communications
  
• Radio channel or frequency
  
• Display
  
• Receive distress relay and distress acknowledgment calls
  
• Alarm

Class F: (Class F has been discontinued by ITU)


VHF. Similar to Class D, but cannot make an individual or routine call, and does not require a display. Voice calls default to channel 16. Not recommended for use in U.S. on other types of radios. Class F required capabilities include:

• Distress call
  
• All-ships call
  
• Use of distress, urgency, and safety priorities
  
• Distress coordinates
  
• Time for last (distress) position update
  
• Receive acknowledgment of its own distress calls

Class G: (Class G has been discontinued by ITU)


Similar to Class F, but applies to MF/HF. Voice calls default to 2182 kHz. Not recommended for use in U.S. Class G required capabilities include:

• Distress call
  
• All-ships call
  
• Use of distress, urgency, and safety priorities
  
• Distress coordinates
  
• Time for last (distress) position update
  
• Receive acknowledgment of its own distress calls

RTCM Recommended Minimum Standard for DSC, Version 1.0, 10 Aug 1995, RTCM Paper 56-95/SC101-STD. Applies to VHF and to MF/HF. SC101 required capabilities include:

• Distress call
  
• All-ships call
  
• Individual station call
  
• Use of distress and routine priorities
  
• Use of safety priority (MF/HF only)
  
• Distress coordinates
  
• Time for last (distress) position update
  
• Acknowledgment or unable to comply response
  
• Receive distress relay and distress acknowledgment calls
  
• Receive Geographical area calls
  
• Test call (MF/HF only)
  
• Alarm

ITU-R Rec. M.825-3:
DSC transponder system for Vessel Traffic Services or ship- to-ship interrogation and identification. Rec. M.825 will be superceded by the forthcoming Universal Shipborne Automatic Identification System.


ITU-R Rec. M.821:
Optional expansion to DSC protocol.