During my stay on a campsite in the north of the Netherlands I enjoyed good conditions on 12 MHz in a relatively noise free environment. That resulted in the reception of a lot of new DSC stations. SHN (Servicio de Hidrografia Naval) in Buenos Aires, Argentina, was one of those!
![QSL Servicio Hidrografia Naval Buenos Aires](https://petersdxcorner.nl/wp-content/uploads/2023/07/Buenos-Aires-SHN-e1690362721784.jpg)
The email reply took hours only and was the shortest possible. But it carried the three key letters: “QSL”! (I added their logo to the email myself to improve the appearance of this post).
I sent my report to shn@hidro.gov.ar. Confirmation followed via snautica@hidro.gov.ar, which is probably the Coast Guard branch.