Graham,

What is permitted depends on who your licensing authority is.

In the UK (unless things have changed recently): 

- Aeronautical Mobile is not permitted,

- /A  for Alternative Address has been reinstated, presumably to distinguish 
operation at a postal address other than the one on one's licence from Portable 
(at a location not associated with a postal address). Presumably it also makes 
life easier for officialdom, although I recall operating away from home when 
newly licensed and receiving a telephone call from the local GPO radio section 
asking me to drop the “/A” as it was confusing their monitoring station,

- as far as I know the Maritime Mobile suffix (/MM) is still required if you 
are operating in tidal waters,

- I do not know whether /B is officially recognised.

Readers please correct me where I got it wrong.

John F5VLF/G3PAI

On 26 May 2012, at 01:21CEST, Graham wrote:

> Q  What are the  permitted  suffixes to the  call  these days  ?
>  
> Are   /P   Portable    /M   Mobile    /B    Beacon   , Now the  only  
> suffixes  in use ?
>  
> The  MM  maritime  mobile  and  AM  Aeronautical  Mobile  are  now  grouped  
> as  / M    ?
> and  /A   alternative is no longer  valid ?
>  
> Tnx -G.