ovorcast v/oathcr, tho small drift, avGraging less than one-fifth knot 

 por hour (sco current sheet), iGsscncd. tho noccssity of havin.g them mo ro 

 froguontly, and considorablo confidence is to bo placed in the accuracy 

 of the v7ork in general* 



"The CHELAU is provided with a Submarine Signal Company fathcmeter, 

 tsrpe 515E, and recorder, . type 505, mth two oscillators in parallel for 

 deep soundings, Vftth this device soundings of more than four thousand 

 fathoms came in sharp and clear under noirmal conditions. There is also 

 installed a wire sounding machine for depths not greater than a thousand 

 motors, its use being primarily for obtaining v/ater scjnples and toiiipcra-.-.i-' 

 tures. It is thus seen that the ship is well equipped for hydrographic 

 surveying and dynamic observations, Tho fathometer jjas carefully, in- 

 spected by. an agent of the company in Seattle in Juno of the present 

 year, both for operation and adjustment to the standard v/hito light 

 speed of 820 fathoms per second. In addition tho wire sounding nm chine 

 was used on several occasions to chock tho fathometer. Salinities were 

 somewhat lower than eacpectod but those determinations Y/cre checked a 

 number of times and are believed to be correct. The vfator tempera.turos 

 agree renarkcbly well v/ith those- observed in the G-ulf of Alaska by the 

 Coast and Geodetic Survey," 



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