APPENDIX A - FSELD PROCEDURE 



Vessel 



The MV Bertha Ann (frontispiece) is a 

 former military refrigerated cargo vessel 

 converted for fisheries work and was char- 

 tered from the Ballard Docks Co. (R. Stewart). 

 Specifications of the vessel are as follows: 



Type - Converted AKL (Ex. U.S. ArmyF.S.) 



Length - 176 feet 6 inches 



Beam - 32 feet 



Draft - 12 feet 



Gross tonnage - 550 



Cruising speed - 11.0 knots 



Cruising radius - 7,000 miles 



Propulsion - Two 6 -cyl. GMdiesel engines — 

 total 1,000 hp. 



Auxiliary power - Two 100-kw. generators 



Electronic equipment - Gyrocompass, loran, 

 fathometer, radio direction finder, radar 



Winches - Oceanographic winch - portable, 

 temporarily installed. 



General arrangement - Raised forecastle 

 head, two cargo hatches amidship, super- 

 structure and engine room aft. 



Oceanographic Observers 



Felix Favorite, Program 

 Leader 

 Alan H. Haselwood 



Robert A. Preston. Jr. 



Oceanographic Casts 



February 10 to 



March 12 

 January 31 to 



April 11 

 January 31 to 



April 11 



A single 14 Nansen bottle cast or two casts 

 of 7 bottles were made to approximately 1,100 

 meters at and between fishing sets. Sampling 

 depths were 25, 50, 75, 100, 125, 150, 200, 300, 

 400, 500, 600. 700, 800, and 1,100 meters. At 

 station Nos. 18 to 23, some sampling depths 

 were changed to provide more information on 



the salinity-minimum stratum. In anticipation 

 of surface warming during the second leg of 

 the cruise, a bottle was inserted at the IO- 

 meter level, which necessitated removal of one 

 at 700 meters. Each bottle carried two pro- 

 tected reversing thermometers, and the bottom 

 8 bottles also carried one unprotected ther- 

 mometer. 



The surface sample was obtained by bucket 

 sample at the time of the 8T lowering, which 

 occurred just prior to the cast. 



Chemistry 



Salinity samples were drawn into standard 

 citrate bottles and were analysed each evening 

 utilizing the Industrial Manufacturing Com- 

 pany (Jayco, South Africa) salinometer Model 

 Mark III. The salinometer was shock-mounced 

 and had its own motor-generator set converting 

 220 volts direct current to 100 volts, 60-cycle 

 alternating current. The salinometer was 

 turned on each evening and calibrated, using 

 Copenhagen water. Secondary standards, pre- 

 viously analysed by chemical methods, were 

 used to insure proper operation prior to 

 analysing samples. Calibration was checked 

 at frequent intervals, and no appreciable de- 

 viation was encountered. The salinities of these 

 samples are reported to three decimal places. 



At Station 29 the motor-generator set broke 

 down, and salinity samples at this and subse- 

 quent stations were stored until the vessel 

 reached Seattle where they were analysed 

 chemically, using the Knudsen method. The 

 salinities of these samples are reported to two 

 decimal places. 



Oxygen samples were analysed aboard ship 

 after the samples were drawn into standard 

 brown glass bottles. Modified Winkler method 

 was used. No surface sample was obtained. 



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