Thanks for the replys everyone, dont know why the e-mail was returned as the address is correct, and have had other e-mails. Nevermind the attached pic if fine to see what the RD87 is about. Have also got more info on it now.
To answer Brian's question, how much use will I make of DSC. Well likly to be not much, (I HOPE
) but if I am buying a new VHF now it will save adding another box or replacing in a few years. I also think that keying in MMSI numbers in a fast moving RIB will be hard in good weather, but time will tell.
With regard to removing the VHF, this will not normaly be done but is useful if you have to leave the RIB in dubious place, most likley on the trailer. Not essential but useful.
I am arranging with a local electronics shop to go and have a look at both. I think that a hands on will decide. From your comments it sounds like I will not go wrong with either. I am not sure about the RD87, looks really good and have got more info on it, but quite expensive when you consider the difference would buy a 406Mhz EPIRB !!.
Again thanks for the info I will let you know if I have joined the Icom or Simrad family.