SECTION 10.0 



RECOMMENDATIONS 



Based on this study of the errors of the Bathythermograph, the following recommendations 

 are made. These recommendations are broken down into the various categories below. 



10.1. Bathythermograph Instrument 



1. Eliminate the bending of the pen arm caused by excessive heating by the sun 

 and the bellows table override. 



2. Displace the uptrace from the downtrace of the BT for further clarity. ^' ■" ' M^ 



3. Place greater emphasis on the 900 foot Bathythermograph and correct its high . y i^i)^ 

 incidence of bellows failure. Wherever possible, use the 900 foot Bathythermo- " '" 1 

 graph exclusively, in preference to the shallower ones. 



4. Check the Bathythermograph frequently for loose parts during its use. 



5. Re-evaluate the Bathythermograph's specifications in the light of the extensive 

 experience which has been obtained in its use since the specifications were 

 written. 



10.2. Calibration 



6. Use a pre-repair test on all Bathythermograms before recalibration. 



7. Calibrate Bathythermographs quite frequently, at least every three months. 



8. Keep a Bathythermograph log of repair history. 



9. Obtain uniformity between testing stations. 



10. Increase capacity of testing stations. 



11. Test all Bathythermographs for the following things in addition to what is now 

 being done : 



a. Hysteresis ~ -'-^ cJ-(Hn>- 



b. Response Rate 



c. Reproducibility 



d. Smoothness, of Response 



10.3. Operational Use of Bathythermograph 



12. Use an adjustable speed winch. 



13. Instruct personnel as to the importance of the data and the care required in 

 taking it. This should be developed into an extensive training program. 



14. Maintain complete notes on the conditions which prevail at the time each Bath- 

 ythermograph cast is made, including every irregularity observed. 



10.4. Correcting Bathythermograph Traces 



15. Use better injection thermometers. 



16. Use better bucket thermometers. 



17. Use reliable, well insulated buckets. 



18. Study the possibility of using independent check point located at a consider- 

 able depth of the ocean rather than at the surface. 



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