A amateur radio transmission message!

Here's a breakdown of the message:

* `03:36`: The time of day in HH:MM format.

* `JA6SZV/P`: The call sign of the amateur radio operator. The `/P` suffix indicates that the station is portable, i.e., not fixed at one location.

* `on JP-1900`: The location of the transmission, which appears to be a park or forest in Chiba Prefecture, Japan. The "JP-" prefix suggests it's in Japan.

* `(Chiba Prefectural Funabashi Forest Prefectural Park, JP-CH)`: A more detailed description of the location, including the name of the park and the prefecture (Funabashi) where it's located.

* `7043 FT8 QRT`: The transmission details. Here:

+ `7043`: The frequency in MHz on which the transmission is taking place.

+ `FT8`: The digital mode being used for this transmission.

+ `QRT`: An abbreviation for "Quit Radiating Terminal", indicating that the operator has finished transmitting and will shut down their equipment.

* `tnx [JA6SZV]`: A thank-you message from the operator to themselves (or perhaps another station) using their call sign.

In summary, JA6SZV/P was operating on 7043 MHz in FT8 mode at Chiba Prefectural Funabashi Forest Prefectural Park and has now ceased transmission.