diff --git a/seaman.py b/seaman.py
index 790f977..0858c62 100644
--- a/seaman.py
+++ b/seaman.py
@@ -117,5 +117,6 @@ class SeaManager(ServiceManager):
                         if inst and sea:
                             insts.add(inst)
                 if unknown[0] in insts:
-                    return super().treat_args(argdict, (), unknown)
+                    argdict['ins'] = unknown[0]
+                    return super().treat_args(argdict)
         return super().treat_args(argdict, unknown, extra)