156 REDISCOVER | REBUILD | SUSTAIN Notes to the financial statements - 31 December 2015 2. Significant accounting policies (cont’d.) 2.3 Summary of significant accounting policies (cont’d.) (e) Ships, offshore floating assets, other property, plant and equipment, and depreciation All ships, offshore floating assets and other property, plant and equipment are initially recorded at cost. Subsequent costs are included in the asset’s carrying amount or recognised as a separate asset, as appropriate, only when it is probable that future economic benefits associated with the item will flow to the Group and the cost of the item can be measured reliably. The carrying amount of the replaced part is derecognised. All other repairs and maintenance are charged to the income statement during the financial period in which they are incurred. Subsequent to initial recognition, ships, offshore floating assets, and other property, plant and equipment are stated at cost less accumulated depreciation and any accumulated impairment losses. Freehold land has an unlimited useful life and therefore is not depreciated. Ships and offshore floating assets under construction and projects in progress are also not depreciated as these assets are not available for use. Depreciation of ships and offshore floating assets commences from the date of delivery of such assets. Depreciation of ships and offshore floating assets in operation and other property, plant and equipment is provided for on a straight-line basis to write off the cost of each asset to its residual value over the estimated useful life at the following annual rates: Ships 2.5% - 4.0% Offshore floating assets 5.0% - 20.0% Buildings 2.0% - 7.0% Drydocks and waste plant 2.0% - 10.0% Motor vehicles 10.0% - 33.3% Furniture, fittings and equipment 10.0% - 33.3% Computer software and hardware 15.0% - 33.3% Plant and machinery 10.0% - 20.0% Tugboats, engines and pushers 6.7% - 20.0% The depreciation policy for drydocking cost included in ships is stated in Note 2.3(x). The residual values, useful lives and depreciation method are reviewed at each financial period end to ensure that the amount, method and period of depreciation are consistent with previous estimates and the expected pattern of consumption of the future economic benefits embodied in the ships, offshore floating assets, and other property, plant and equipment.
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