Month Feb Mar Apr Ma Jun Jul Se Oct Nov Dec 
Dep Ae = - — = 
Surface 62.7 65.4 69.7 74.3 80.7 82.0 83.0 77.5 70.5 65.4 
10 feet 62.8 65.4 69.4 74.2 80.4 81.7 82.7 77.3 70.4 65.4 
20 feet 62.9 65.4 69.5 73.9 79.9 81.2 82.2 76.9 70.3 65.4 
30 feet 63.0 65.4 69.3 73.4 79.2 80.3 81.2 76.3 70.0 65.4 
50 feet 62.9 65.1 68.4 72.1 77.3 78.2 79.0 74.6 69.1 65.0 
70 feet 63.1 64.5 67.7 70.7 74.9 75.8 76.4 72.8 68.2 64.8 
100 feet 62.9 64.0 65.9 67.9 70.6 71.2 71.6 69.2 66.2 64.0 
150 feet 63.4 64.3 65.7 67.1 69.2 69.6 69.9 68.2 65.9 64.3 
180 feet 63.6 64.4 65.7 67.1 69.0 69.4 69.7 68.1 66.0 64.4 
STEP X 
Since the (T__) or (T_) represents the surface temperature at 
a point nearshore, corrections are presented in Tables IX, X, XI, 
and XII to obtain the surface temperature (Tw g)above the 30-fathom 
isobath. These corrections are based on ienited data and presented 
to show an ‘‘order of magnitude’’ of horizontal gradients of temperature 
in each of the four climate classes. Where the 30-fathom isobath is 
more than 10 miles offshore, the correction at 10 miles is suggested 
as an approximation of that at 30 fathoms. 
10 
