Table 7- bill of quantities for the mooring buoy system in 36 meters water depth  1-Supply of 100 millimeters diameter, steel grade2 330 meter  2-Supply of swivel shackles 175 tons S.W.L. Unity 8  3-Supply of D-type joining shackles 175 tons S.W.L. Unity 8  4-Supply of D-type anchor shackles 175 tons S.W.L. Unity 4  5-Supply of buoy shackle 175 tons S.W.L. Having eye diameter not less than 250 millimeters. Unity 4.