st50+ depth replacement compatibility

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Lazybones,

Q1. Is there a transducer that I can use to replace the failing one that would work with the existing ST50+ head? If so which one?
A1. Yes. The ST50+ Depth Instrument may be used with any of the analog Depth, Depth/Temp, or Depth/Temp/Speed Instrument Transducers found here. Typically, a ST50+ Depth Instrument would be interfaced to a M78713-PZ-A P19 Instrument Depth Transducer or a M78717 B17 Instrument Depth Transducer.

Q2. if not, which transducer (current one is in hull) would I use for the ES127?
A2. See the response to Q1.