I just did a major mid season electronics tweak and while I was at it replaced my Standard Horizon DS-35 depth sounder with a Raymarine ST-60.
Previous to the Standard Horizon DS-35 I had a Datamarine depth sounder. When the Datamarine failed the P.O. was in the Carib and could only find the DS-35.
They both had RCA cable connectors so the PO just used the original Datamarine depth transducer for the Standard Horizon DS-35 and it worked perfectly as they are both the same frequency.
I decided to experiment before installing my new Raymarine/Airmar transducer and low and behold the ST-60, when connected to this 20 year old Datamarine transducer, works perfectly!!!
I simply bought a short pre-made RCA cable and cut it open exposing the internal wires. I tied the "pin" or center pin from the RCA to the "blue" input on the ST-60 and the ground wire to the "black" input on the ST-60. I did not use the "screen" or shield port on the back of the ST-60.
So for those of you who have an old instrument die mid season, and you want to avoid a haul out, an ST-60 can and will work with older transducers like the Datamarine if you're creative..
After ST-60 using the same transducer!