CRANE SHIP Russian patent published in 2014 - IPC B66C23/52 B66C13/02 B63B27/10 

FIELD: transport.

SUBSTANCE: proposed crane ship includes hull with load-lifting boom devices with counterweights installed on it. Ship hull is provided with ballast keels fitted in centreboard wells located in diametral plane of ship. The ballast keels fall in lower position when heavy-weight objects are lifted, thus lowering ship centre of gravity and increasing its stability when ship width is limited. The ballast keels in their upper portion are made hollow being able to be filled with ballast water, and in their lower portion they are made as massive cast-iron bulb which transport position is sunk in centreboard well up to the level of base plane of ship thus decreasing ship draft.

EFFECT: heavy-weight objects lifting in the presence of wind is provided while keeping ship stability.

2 cl, 4 dwg