Tanker Sola and Norwegian navy frigate Helga Ingstad collide off Norway

Let’s repeat. KNM Helge Ingstad (HI) (AIS switched off) approaches M/T Sola TS on a head on collision course early morning in restricted waters with plenty other ships around. The two ships talk on VHF. Sola TS asks HI to turn starboard. Sola TS also turns starboard as per colregs. But, in the last moment HI turns port. When HI at 14 knots has turned port 20° and Sola TS at 6 knots has turned starboard 10°, the starboard bow side of HI contacts Sola TS bulbous bow below waterline. The angle between the two ships is 30° and the relative speed 20 knots in this unlikely moment of contact. The HI starboard side shell plate below waterline down to the bilge is sheared off like a slice of cheese. Water enters and up-floods HI’s hull compartments (engine rooms flooded!) and HI starts to heel starboard, so that the Sola TS anchor and bow flare above waterline contact the HI aft superstructure, which is ripped open at the stern end of HI. The collision lasts about 15 seconds and must have been very noisy on HI. On Sola TS they hardly noticed anything as the contact is 200 m forward. HI later talks to shore and reports that it has run aground. It seems that HI swings around 120° starboard during the collision, pushed by Sola TS, and then stops dead in the water. That HI doesn’t capsize upside down to float a while before sinking with a 100 m long opening in the starboard side below waterline killing all aboard is a miracle maybe explained by the fact that warship HI has watertight decks in the hull with small watertight hatches (all escapes are vertical ladders in these hatches), so that temporarily air was maybe trapped there providing buoyancy during the evacuation of HI. Tugs later push HI onto the steep shore, where it finally sinks with only the forward top light above water. It is a pity that no crew members of HI have told media what really happened aboard and how they survived. It is an amazing and unlikely collision but with a happy ending. Nobody died.