 Nyorai kupfuurira kweiyi ndima - Pashure pokurwisana muna 1989 pakati peMarchionessuye dredger Bowbelle izvo zvakaguma nokurasikirwa noupenyu hwe51, Thames Safety Inquiry yakakurudzira kuvapo kwekutsvaga uye kununura kwakanyatsorongedzwa paThames. Sangano reMaritime and Coastguard Agency MCA rakasarudzwa kuti ritungamirire mabasa akanga atovapo paThames. Sezvo vakanga vatova nemabasa okushanda, vakasvika RNLI ndokubvunza kana vaigona kugovera basa rokununura. 