DREDGING. 343 



Aden Harbour. 1 Dredging with a hopper- dredger of 1000 tons 

 capacity in soft material, in varying depths up to 35 feet, and 

 conveying to a distance of four miles. 



Per cent. 



Repairs to machinery , ... 24*77 



Coaling 0-38 



Picking up moorings ... 6*93 



Shifting moorings forward 10*04 



Time actually dredging 37'06 



Depositing 20*82 



100*00 



Plymouth Elver Tamar. No. 1. Dredging with double ladder 

 stationary dredger in soft mud, to a minimum depth of 32 feet. 



J'er cent. 



Filling hopper barges 5350 



Waiting for hopper barges 14*25 



Shifting moorings 15*50 



Repairs and cleaning 550 



Waiting for tides 1025 



Miscellaneous petty losses 1*00 



10000 



No. 2. Stationary double ladder dredger working in soft 

 mud in River Tamar. 



Per cent. 



Filling hopper barges 49*20 



Waiting for hopper barges ... 370 



Shifting moorings 9*10 



Repairing and cleaning 4*40 



Waiting for tide 2310 



Rough weather 10*40 



Miscellaneous petty losses of time 0*10 



100-00 



No. 3. Stationary double ladder dredger working in soft 

 mud in the Sound. 



Per cent. 



Filling hopper barges 37*40 



Waiting for barges 2*50 



Shifting moorings 3*90 



Repairing and cleaning ... 0*60 



Waiting for tide ' ... ... 39*00 



Rough weather 15*60 



Miscellaneous petty losses of time 1-00 



100*00 



In these three cases the effective dredging time would have 

 been improved greatly had the barge service been better and the 

 ladders longer. 



1 M.P.LC.K, vol. cxvi. p. 281. 



