diff --git a/src/odm.cpp b/src/odm.cpp
index bd92c7c..610156f 100644
--- a/src/odm.cpp
+++ b/src/odm.cpp
@@ -6,9 +6,11 @@ inline void Usage(const MString& arg0)
  message("Keys are:");
  message(" action. What the program should do. May be: info, tsc. Default: tsc.");
  message(" Keys for action=info. Print some information about dataset.");
- message("  source. Required. May be: NEMO");
+ message("  source. Required. May be: NEMO, HYCOM");
  message("  Keys for source=NEMO");
  message("   dataset. Can be DT, NRT or NRT6. Default: DT");
+ message("  Keys for source=HYCOM");
+ message("   dataset. Can be Forecast, Hindcast or Reanalysis. Default: Forecast");
  message(" Keys for action=tsc. Get temperature, salinity, chlorofill from dataset.");
  message("  source. Required. May be: NEMO");
  message("  var. Required. May be: temp, sal, chl, mld, ssh or w.");
@@ -16,9 +18,12 @@ inline void Usage(const MString& arg0)
  message("  timeb, timee. Time interval. If present, time must be absent");
  message("  out. Output file. Default: out.bin");
  message("  Keys for source=NEMO");
- message("   var can be temp, sal, mld, ssh or w. Mld is not available for dataset=NRT6.");
  message("   dataset. Can be DT, NRT or NRT6. Default: DT");
- message("   layer and/or depth. Layer or depth of NEMO dataset. If depth is specified, layer is ignored. Both ignored, if var=mld. Default: layer=0");
+ message("   layer and/or depth. Layer or depth of NEMO dataset. If depth is specified, layer is ignored. Both ignored, if var=mld or var=ssh. Default: layer=0");
+ message("   lonb, lone, latb, late. Required. Region of interest");
+ message("  Keys for source=HYCOM");
+ message("   dataset. Can be Forecast, Hindcast or Reanalysis. Default: Forecast");
+ message("   layer and/or depth. Layer or depth of HYCOM dataset. If depth is specified, layer is ignored. Both ignored, if var=mld or var=ssh. Default: layer=0");
  message("   lonb, lone, latb, late. Required. Region of interest");
 }