Versatile PCTC series features MacGREGOR RoRo access equipment
MacGREGOR hatch covers contribute to double-hull bulker safety
The geared 53,000 dwt design was evolved after extensive discussions with charterers on operational requirements and consultation with DNV on structural and regulatory issues, the key considerations being:
Numerous structural and operational merits are cited for the resulting wide-hatch design which features a complete double hull in the cargo holds forming a second barrier against accidental water ingress and substantially strengthening the hull. A cargo capacity of 64,000m3 is provided in five holds served by four 36 tonnes-capacity cranes.
Major operational cost savings, with significantly enhanced safety and environmental protection, have attracted orders from leading operators for Diamond 53 bulkers to be built in Chinese yards.
Cargo handling efficiency and security are enhanced by MacGREGOR high-stowing end-folding hatch covers, each set comprising 2+2 panels arranged fore and aft of the holds to yield the following clear openings: 19.2m long x 20.8m wide (No 1 hatch) and 21.6m long x 22.4m wide (Nos. 2-5 hatches). The weathertight covers are operated by external hydraulic cylinders and manually cleated.
A double-skin steel construction facilitates cleaning of the covers, and their top and skirt plates are specified with scantlings that are greater than the minimum. Hatch cover loadings and corrosion allowances are in accordance with the future UR S21 Revision 3 and IMO revised Load Line Protocol of 1988.
A number of distinctive design features benefit the installation, operation and reliability of the covers, notably:
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