Raymarine CPT-S Transom Mount - Conical - High Chirp. CPT-S transducers are strictly high chirp sonar transducers and do not include the downvision element. Specifications for Raymarine CPT-S Transom Mount: Manufacturer: Raymarine Color: Black Features of Raymarine CPT-S Transom Mount High Chirp Sonar Transom Mount has a trolling motor bracket accessory Max Depth: 900' CPT-S 0 plastic is perfect for a sailboat application MFD must have version 16 software or later Package Contents: Raymarine CPT-S Transom Mount Raymarine E70342: CPT-S Transom Mount - Conical - High Chirp