1 HYCOM NetCDF is
   1 spatial
   1 single time slice
   1 single variable
 1 Aggregated by THREDDS catalog
 1 Slice for top layer
 1 Constrain bounding box to -98W, +37E, +56N, 0S
   1 Latitude Indixes 365 (inclusive) to 1214 (exclusive)
   1 Full range of Longitude
 1 Collect all times into monthly files
 1 Temp, Salinity, thickness, u, v