If a UK ship is fitted with ECDIS (either in accordance with SOLAS or voluntarily), and fusing the ECDIS as the PMN, the Record of Equipment (RoE) attached to the relevant SOLAS safety certificate (i. e. Form P for a Passenger Ship Safety Certificate, Form E for a Cargo Ship Safety Equipment Certificate, or Form C for a Cargo Ship Safety Certificate) must indicate this. The RoE must also state the back-up arrangement in place.