TABLE III 
Four-hour average temperatures in °C observed at 150-ft depth 
at various times during the first day's run 
TIME 
BUOY 2000 2400 0400 
1 27.7 PAS U 27.75 
2 28.25 28.0 28.2 
4 27.75 27.75 27.95 
) 27.6 27.65 28.25 
Comparing the entries in this table, we see that the greatest 
average temperature difference for a given separation is that between 
Buoys 1 and 2 at 2000 hr, of magnitude 0.1°C per mile. This difference 
is small in comparison to the difference in average temperature at dif- 
ferent depths at the same buoy on this day, which averaged 0.1°C for 
5 ft. Thus, there is a factor of about 1000 in the ratio of horizontal 
to vertical average temperature differences. Part of this ratio can be 
accounted for if the depths of these units differed by several feet. This 
may have been due to differential stretchage, tangling, or slippage of the 
suspension points on the Manila rope to which all the units were connected. 
However, every effort had been made prior to the launching to make the 
buoys identical in construction. 
Records obtained on successive days at the same buoy and depth are 
illustrated in Fig. 5. Note that they appear to share the same general char- 
acter. These records will be further analyzed and illustrated in the next 
section. 
