rtofs_glo.navy_0.08.depth subregioned to HCP70 via sub_topog                   
i/jdm = 876 476 1x smoothed in GoC, 2x elsewhere                               
sill depth corrections by Christy Thomas                                       
Java Sea corrections                                                           
landmasked boundaries and mask                                                 
min,max depth =     10.793  7229.554