The UK Marine Accident Investigation Branch (MAIB) issued a safety bulletin regarding overweight rescue boats.

Follow up:

During an investigation into the failure of a fall wire of a rescue boat with the loss of one life, it was discovered that the rescue boat was significantly over its design weight. Further analysis revealed that water had entered the integral polyurethane foam-filled compartments, where it was retained. The MAIB recommends that boat hulls be inspected for possible holes, cracks, or fittings through which water may penetrate and the drain plugs are regularly opened to allow for removal of excess water. Safety Bulletin 1/2011 (6/29/11). Bulletin is posted on MAIB web site http://www.maib.gov.uk