OurAirports has records for 6 different navaids with the identifier "SY". Please select the one you'd like to view.
Australia
112.10 MHz (SY ... -.--)
... -.--
Bangladesh
372 KHz (SY ... -.--)
China
384 KHz (SY ... -.--)
Germany
New Zealand
350 KHz (SY ... -.--)
United States
242 KHz (SY ... -.--)