§ Dr. David Clark
To ask the Secretary of State for Defence what technical problems have been experienced on the Sonar 2054 system for use in the Vanguard class strategic submarines ballistic nuclear; and if he will make a statement. 
§ Mr. Freeman
The problems experienced with sonar 2054 and its associated towed array handling system relate to the inboard reeling system and operability issues. They do not affect the sonar's ability to support operational patrols. A programme of work to address these outstanding issues is in hand.