4 INDIAN MARINE SURVEYS. 



India on both coasts from False Point round to Bombay. The 

 following were visited and reports made on eacb : — 



False Point. Colachel. 



Gopalpur. Cochin. 



Calingapatam. Narakal. 



Bimlipatain. Beypur. 



Vizagapatam. Calicut. 



Coconada. Tellicherri. 



Masulipatam. Cannanur. 



Madras. Mangalore. 



Negapatam. Karwar. 



Tuticorin. Bombay. 



Owing to the special surveying steamer which was being 

 built at Bombay not being completed, the surveying operations 

 during the year were entirely carried on by two boat parties, one in 

 charge of Lieutenant Jarrad, R.N., and the other (a smaller one) 

 in charge of Mr. Morris Chapman, late I.N. The first-named 

 party surveyed the port of Itatnagiri (including Mirya and 

 Kalbadevi bays) in four months, the plotting comprising 38 miles 

 of coast and 21 square miles of water sounded on the scale of 

 •1 inches to 1 nautic mile. Yiziadrug, including Rajapur and 

 Ambol Ghur bays, was next taken in hand, and sailing directions 

 for all these parts in the shape of hydrographic notices were also 

 compiled. Both at Mirya and Yiziadrug the large percentage of 

 iron contained in the laterite (which in some places forms a layer 

 of considerable thickness over the igneous rock of which the coast 

 is formed) exercised a very considerable disturbing effect on the 

 compass needle, so it was with considerable difficulty that magnetic 

 observations were made. Both on this account and owing to the 

 inconvenience of working with boats in lieu of a well-found 

 surveying vessel slow progress was made. 



At Paumben, Commander Taylor had found during his tour of 

 inspection that an accurate survey of the pass or channel between 

 India and Ceylon and its approaches was much required ; the only 

 existing chart being on too small a scale. The Government of 

 India further desired that the examination might be complete, so 

 as to enable a time estimate to be formed of the labour required 

 for any subsequent widening and deepening of the channel. The 

 last survey by Commanders Powell and Ethersey, late I.N., 



