The Raymarine CPT-DVS transom-mounted transducer can be used with Dragonflys with a green locking collar such as the Dragonfly 4 and 5 (all variants except 5M) and the

Raymarine CPT-S Plastic Conical HIGH CHIRP Transom Mount Transducer CPT-S Plastic Conical HIGH CHIRP Transom Mount Transducer, 10m Part Number RAY-E70342

The R70439 Raymarine Transom Mount is made specifically for Raymarine's CPT-DV / CPT-DVS transducers.  

Raymarine CPT-100DVS Plastic Transom Mount Chirp Transducer. Compatible with: Axiom (with adapter cable) A78 A98 A128 CP100 Sonar Module Part Number Records Approved Hull Material Cable...

Raymarine RV-100 Transom Mounting Bracket Raymarine transom mount transducer service kit includes all of the spare parts and accessories originally included with the RV-100 transducer. The...

Raymarine HV-100 Transom Transducer Bracket

Raymarine CPT-S Trolling Motor Mounting Kit Part Number RAY-A80363

Raymarine Transducer Extension for CPT-S, CPT100, CPT110 & CPT120 Part Number RAY-A80273