Raymarine forum

what unit and accessories are required. new boat came with a es128 also cp370 sonar and hs5 sea talk think it has power source unit and transducer

Hello gh33outrage,
To add another eS128 you will need to order Raymarine part# E70285-LNC and then a length of Raynet to Raynet cable to either wire the two MFD's directly to one another or to go from the new eS128 to the HS5 network switch.