Figure F-5. Portion of A-Sheet showing thermometrie calculations. 



Step 3. Enter Table F-1 and determine 1/pm for wire length (L), using nearest oceanic region. 

 Enter value in 1/pm block. 



1/pm for wire length depth (L) 500 meters, North Atlantic Ocean is .9730. 



Step 4. Compute thermometrie depth (Z) in meters from formula, and enter result in Thermo- 

 metrie Depth (Z) column. 



(Tu-Tw) 1/pm (T„-Tw)_.9730X4.09 



Z= 



pm "Q" Factor "Q" Factor 



.0081841 



'=486 



Step 5. Compute L-Z Obs (observed) by subtracting Z from L (wire length depth). Enter 

 L-Z Obs column of A-Sheet. 



L-Z=500-486=14 



Table F-1. Mean density of sea water column above estimated depth 



' Norwegian and Greonlaiid Seas. 

 ' Ross and Weddell Soas. 



F-6 Determining Accepted Depth (D). — 



The accepted depth (I)) is determined by the 

 L^Z graphical method. The L-Z Graph, NAV- 

 OCEANO-3167/62 (Rev. 10-64) (fig. F-6) is 



used to facilitate the calculations. The pro- 

 cedures used to construct the L-Z graph follow : 

 Step 1. On the vertical side of the graph, lay 

 off wire length depth (L), starting with zero at 



P-7 



