One of the Royal Navy’s (RN’s) most advanced Type 23 frigates has re-entered operational service, fitted with Thales’s Sonar 2087 system, following a period of sea trials. HMS Sutherland has been declared fit for operational service after trials of its major sonar and defensive systems, and now becomes the sixth Type 23 frigate to be upgraded with the Sonar 2087 system. In November 2008 the Ministry of Defence (MoD) announced that HMS Sutherland had left Rosyth dockland for the trials after a multi-million pound refit that included major upgrades to its sonar…