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Loss of crew member - heeling + sinking of SY Down North (CAN flag)
#1
Report 15/15 (30th May 2015) by SMAIC - State Marine Accident Investigation Commission see pdf attachment ... it contains interesting stability calculations to learn from ...


On 30 May 2015, at approximately 19:00 near the Greifswalder Oie Island in the Pomeranian Bay, the Canadian-flagged yacht Down North, sailing from Świnoujście to Oslo (Norway) engaged in a sail-training and mile-building cruise, suffered a deep heel in result of ca. 7° B windgust. 

Attempted maneuvre of letting out the mainsail and bearing away from the wind failed. The yacht heeled over with its starboard side in the water and failed to right itself. 

All 12 members of the crew evacuated to a life raft and a tender. Evacuation of one of the crew members unable to move independently due to disability resulting from multiple severe medical conditions, was extremely difficult. After being transported to the life raft, he suffered a cardiac arrest. He died inside the life raft despite resuscitation efforts taken by the crew. 

The yacht, lying on its starboard side, took in water and sank within approximately 20 minutes. The life raft and tehe tender with the survivors were noticed by the German vessel Palucca, which took the remaining 11 persons on board and called for help by radio. 

The survivors were taken from the vessel Palluca by the Polish SAR vessel Pasat and transported to Świnoujście. Four months later, the wreck of the yacht Down North was lifted from the bottom of the Pomeranian Bay and towed to the port of Świnoujście, and then transported to Szczecin by land.

Challenging regions the Down North has sailed in ...
[Image: raport-pkbwm-w-sprawie-jachtu-down-north...55x590.jpg] 
[Image: downnorth3.jpg]

Astonishing the radical change of the original hull with bulbous bow and astern decks extension
[Image: modifications-of-Down-North-hull.jpg]
In effect of these modifications, the hull length increased from 14.8 m to more than 17 m and the displacement of complete and unladen yacht increased from less than 25 tonnes to more than 35 tonnes. The new load place on the aft deck (inclusive tender) created a plus of 0.8 tons.

Stability analysis from the investigations under different load conditions (documented in the report)...
[Image: Heel-angel-SY-Down-North.jpg]
The yacht’s stability analysis was performed for 4 loading conditions:

1) Colvin 45 condition – the state in which the originally designed and built Down North was operated, without any later modifications, with 4-member crew;
2) condition 1 – complete unladen yacht, no crew and no deck load (location of centre of gravity calculated on the basis of the performed inclining experiment);
3) condition 2 – complete yacht with 12-member crew and standard consumables, with additional load placed at the aftdeck (2 tonnes) and amidships (2 tonnes) – state as of the day of the accident, according to the owner’s explanations;
4) condition 2a – complete yacht with 12-member crew and standard consumables, with additional load placed at the aftdeck (0.8 tonne, including tender hanged on davits behind the stern transom) and amidships (0.7 tonne) – state as of the day of the accident, according to the skipper’s explanations.

Despite careful calculations, it should be emphasized that all obtained results are only indicative. The comparison of analyzed loading conditions enables formulation of significant conclusions, which might indicate possible causes of accident.
[Image: stability-data-SV-Down-North-1.jpg]

What remains is a wreck ...








[Image: SY-down-north-2015.jpg]


Attached Files
.pdf   FINAL_REPORT_WIM_15_15_Down_North.pdf (Size: 2.8 MB / Downloads: 3)
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#2
I remember this ship very well ... when it started its expeditions.

S.Y. Down North is a real Drama Queen. Not enough the terrible accident in 2015, she sunk again after a major overhaul in february 2016 in the marina ...
[Image: 2017-02-16_148724499621.jpg]
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