Sorry have been away all day and only just checking the list.
The DSC radio's in the US, other than the M602 are not class D they are class F or SC101.
They do not have a dedicated watch keeping reciver for ch70 (DSC Channel)
They scan ch70 rather than watch it all the time.
The watch keeper is required by ITU rules.
We do not make the rules just have to work to them.
As a rule the mX01 are EU products the MX02 are US.
The M503 came up because we insisted we wanted the dual station verstion of the M501.
If you buy it in the US you will only get 1 year warranty, not 3 like we give also we will not service or repair it, more over it is not legal to have that kit in the UK/EU let alone use it.
£5000 fine and confiscation of the radio and its power supply (your boat)
In the US if you are a pleasure boat and you are staying in US waters you can use the lower standard of DSC (class F or SC101) if you are a commercial vessel and or are leaving the US waters then you must fit a Class D DSC.
Every one charges extra for thier flush mount kit you are lucky that with our you could, so I understand, use the bracket supplied although not recomended by us.
"less than 4" was the quote from Mr Fisher, don't shoot the messanger
What is classed as a false alert in your book may not be the same for the MCA.
People are not setting off DSC willy nilly its far to easy to trace them.
Hope I covered all the points