Dry cargo vessel "ONERIVA 41" (prj. 964) was modernized for grain transportation by increasing height of cargo hatches' coaming
A significant modernization of dry cargo vessel "ONERIVA 41" of 964 prj. ("Volgo-Don" type vessel od 1565 prj. after shortening) for grain transportation was completed. The modernization was carried out by increasing height of cargo hatches' coaming.
The modernization was fulfilled at Hidrodinamik Shipyard, Tuzla, Turkey.
The modernization project was designed by Marine Engineering Bureau.
After modernization the vessel received class notation KM L4 R2-RSN of Russian Maritime Register of Shipping.
As a result of modernization, the capacity of cargo holds has been increased from 3955 m³ to 4511 m³ (plus 586 m³ or 15%); that enhanced vessel's loading capacity for grain transportation (at draught 3.6m deadweight is 3375 t, with 100 tons of stores the specification SF increased to 1.39 m³/t).
At the same time, the standard of general strength has grown significantly: the section modulus of hull due to coaming satisfies RS Rules with 23.9% reserve with today actual hull elements thickness. The section modulus of hull due to bottom satisfies RS Rules with 23.8% reserve.
The main works which were made by the shipyard:
• increase the height of the longitudinal coaming by inserting a vertical sheet of 800 mm high;
• mounting of longitudinal stiffness onto the inset sheet in the form of a welded T-beam;
• shifting the upper part of the existing longitudinal coaming and counterforces vertically upward together with all details;
• mounting of new counterforces;
• enlarging the foundations of the hatch covers' winches.
The material of the installed vertical coaming inserting and its stiffness is D36 category shipbuilding steel with yield strength of 355 MPa.
After the modernization " ONERIVA 41" is a double-screw cargo vessel with 2 cargo holds, with double bottom and double sides, with engine room and deck house located aft.
The vessel is intended for transportation of general and dry bulk cargoes, including timber, large-sized cargo, ISO containers of, dangerous goods and coal.
Main characteristics of the vessel:
Length overall, m - 105.30;
Length between PP, m - 102.08;
Breadth overall, m 16.50;
Depth, m - 5.50;
Draught (Summer freeboard), m - 3.847;
Deadweight in sea, t - 3894;
Holds capacity, m³ - 4541.
The modernized dry cargo vessel "ONERIVA 41" has technical-economic indicators that significantly exceed the ship's capabilities before modernization; that allows she to be efficiently operated in mixed river-sea and marine transportations.