54 



HYDROGRAPHICAL SURVEYING [chap. i. 



Ammuni- 

 tion. 



Carpen- 

 ter's 

 Stores. 



Boat- 

 swain's 

 Stores. 



Ammunition case, containing- 



3 rockets with rope tails. 



2 long lights. 



1 handle and primers. 



1 portfire. 

 If a boat meets with an accident, this ammunition will 



come, in handy to attract attention after dark. 



20 blank cartridges. 

 50 ball cartridges. 

 20 pistol cartridges. 

 2-feet of slow match. 



Carpenter's bag, containing — 



Hammer Fearnought. 



Nails of sorts. Lead. 



Chisel. Tallow. 



Bradawl. Strips of copper. 

 Gimlet. 



Boatswain's bag, containing — 



Marlinspike. Palm. 



2 sail-needles. Bits of canvas. 



Twine. Spun-yarn. 



Marking 

 of Lead- 

 Lines. 



LEAD-LINES. 



The first thing in a newly commissioned ship is to get the 

 lead-lines well stretched. 



Until this is done it is only loss of time to mark the multitude 

 of hnes wanted for surveying. 



As soon as the ship leaves port, tow seven or eight hundred 

 fathoms of the new line astern, with a heavy lead on it, for 

 some days. The line will then have got to its normal length, 

 but lead-lines will always want remarking from time to time. 



The following Fiy.'Stem hafi been recently adopted in marking 

 lead-lines, both for ship and boat uSe, no other system being 

 now used by H.M. Survejdng vessels : 



