SELCALL is a small and simple programm to translate maritime SITOR selcalls It just translates a selcall ... no sliding windows, no sound, no animation sorry A SITOR selcall is a selective call identifier for selective addressing of a distant communications station, used in SITOR radio teletype communications according to CCIR 476-4 The calling signal to start a SITOR circuit consists of 2 blocks of 3 charac ters each. The Selcalls are 4-letter combinations contained in these 2 blocks If the SITOR teletype gear of a radiostation is allocated the selcall 'XXXX it will phase and automagically reply to any call from any station calling with the selcall XXXX While radioamateurs and other fixed stations may use any 4-letter combination as a selcall, there are more strict rules in the maritime mobile service (MMS The maritime mobile service (MMS) uses 4- and 5-digit selective call NUMBERS The 4-digit numbers are assigned to coast stations and the 5-digit numbers are assigned to ship stations on a world wide basis These figure selcall numbers are mapped to letter selcall combinations suitable for SITOR transmission on air
