average HYCOM th3d mean: 2004.00-2013.00 [23.2H] :	   -23.067835       2.8144345    
 sea surf. height  mean: 2004.00-2013.00 [23.2H] :	  -0.22409636       1.3619275    
min,max depth =	    5.0000000       7199.9800