Santa Maria Aero (CSY) :

 

listen to Santa Maria, talking to an aircraft, and giving a 'sel-call-check' (rb, 2014)
Nils Schiffhauer picked up this chat between Santa Maria and a MartinAir flight (2016)

Phil Finkle received this prepared QSL for a reception way back in 1955
in 1968, Lars Lundström received this friendly letter for a fixed circuit to Birdlip, UK
a friendly letter with a PPC for Frank Schüttig (1978)
this QSL for both ground-to-air and aeronautical fixed Service was received in 1985 (rb)
Dieter Pohlmann received this letter in 1986, giving QSL and some more details on stations' work
very detailed verification letter from the files of Rudolf Renkwitz (1993)
nice QSL letter from 2004 (Vladimir Rozhkov)
a friendly and detailed letter from the collection of Fabricio Andrade Silva (2013)


here is the homepage for the portuguese air navigation service

 

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Callsigns:
CSY**
LPAZ

 

Frequencies Voice:
2899
2962
3016
3023
3194
3476
4789
4805
4960
5402
5598
5616
5626.5
6628
7470
8045
8825
8864
8879
8906
11309
11340
13291
13306
16234
17946
20130

 

Frequencies Radioteletype:
3175
4997
5474
5893
6775
6999
9994
10286
10540
11192
11470
12124
12240
12323
13365
14497.5
17455
18380

 

Systems used:
50 Bd