Refurbishment and Class inspections
The vessel, Queen of Abu Simbel, operates on Lake Nasser in southern Egypt. The vessel will need to be dry docked in order to complete the refurbishment and also to carry out the required Class inspections. The problem is that there are no facilities on Lake Nasser to actually get the keel dry. The client/owner wanted a proposal to “pull” the vessel onto a slipway; however they do not have the expertise to engineer, prepare and execute the operation. This is where Saltwater Engineering and our partner for this project, Hebo Maritiemservice, come into play. Saltwater Engineering as the name suggests for the engineering and Hebo for the operational aspects.
Removing Queen of Abu Simbel from the water
The balloon/airbag method basically entail pulling/rolling the vessel over a large number of balloons/airbags. The forward balloon is to be located under the forward end of the keel where the vessel touches the slipway in present floating condition. From there the bow of the vessel is pulled up along the slipway and consequently more balloons are added. Various sizes of balloons are utilized to equalize the level difference between vessel and slipway. The critical steps have been calculated and give the load on the balloons, displacement in the water and draughts.
The second alternative would be to build a steel slipway with rails and pull the vessel ashore using trolleys. As the vessel is pulled up the slipway an additional trolley will support the hull allowing for an even distribution of the bending moments.
The current status is that the initial calculations and high-level feasibility studies have been completed. These have been presented to the owner for evaluation and determination of the further course of action.