German Navy

While driving back from Southend this morning we spotted this German Navy F219 ship travelling along the Estuary up towards London so i've since googled it http://www.seaforces.org/marint/German-Navy/Frigate/F-219-FGS-Sachsen.htm and just wondering what it's travelling up to London for!! HOpe it behaves!!  Love seeing boats of all kinds as my late godfather used to be in the merchant navy so he'd always point out various ships to us when we were out and about so that interest has always stuck with me!