+Next stab at fixing REMAP_AUX fallout.

- This fixes the Bering ORLANSKI OBCs for differing processor counts.
- This is either the wrong way to do group_pass for OBLIQUE OBC's or
  there is more wrong with them.

src/core/MOM_dynamics_split_RK2.F90

@@ -1194,9 +1194,9 @@ subroutine remap_dyn_split_RK2_aux_vars(G, GV, CS, h_old, h_new, ALE_CSp, OBC, d
 
   if (CS%store_CAu) then
     call ALE_remap_velocities(ALE_CSp, G, GV, h_old, h_new, CS%u_av, CS%v_av, OBC, dzRegrid)
-    call pass_vector(CS%u_av, CS%v_av, G%Domain)
+    call pass_vector(CS%u_av, CS%v_av, G%Domain, complete=.false.)
     call ALE_remap_velocities(ALE_CSp, G, GV, h_old, h_new, CS%CAu_pred, CS%CAv_pred, OBC, dzRegrid)
-    call pass_vector(CS%CAu_pred, CS%CAv_pred, G%Domain)
+    call pass_vector(CS%CAu_pred, CS%CAv_pred, G%Domain, complete=.true.)
   endif
 
   call ALE_remap_velocities(ALE_CSp, G, GV, h_old, h_new, CS%diffu, CS%diffv, OBC, dzRegrid)

src/core/MOM_open_boundary.F90

@@ -9,6 +9,8 @@ module MOM_open_boundary
 use MOM_cpu_clock,            only : cpu_clock_id, cpu_clock_begin, cpu_clock_end, CLOCK_ROUTINE
 use MOM_diag_mediator,        only : diag_ctrl, time_type
 use MOM_domains,              only : pass_var, pass_vector
+use MOM_domains,              only : create_group_pass, do_group_pass, group_pass_type
+use MOM_domains,              only : start_group_pass, complete_group_pass
 use MOM_domains,              only : To_All, EAST_FACE, NORTH_FACE, SCALAR_PAIR, CGRID_NE, CORNER
 use MOM_error_handler,        only : MOM_mesg, MOM_error, FATAL, WARNING, NOTE, is_root_pe
 use MOM_file_parser,          only : get_param, log_version, param_file_type, log_param
@@ -366,6 +368,7 @@ module MOM_open_boundary
                                 !! for remapping.  Values below 20190101 recover the remapping
                                 !! answers from 2018, while higher values use more robust
                                 !! forms of the same remapping expressions.
+  type(group_pass_type) :: pass_oblique  !< Structure for group halo pass
 end type ocean_OBC_type
 
 !> Control structure for open boundaries that read from files.
@@ -1869,9 +1872,10 @@ subroutine open_boundary_init(G, GV, US, param_file, OBC, restart_CS)
   if (OBC%radiation_BCs_exist_globally) call pass_vector(OBC%rx_normal, OBC%ry_normal, G%Domain, &
                      To_All+Scalar_Pair)
   if (OBC%oblique_BCs_exist_globally) then
-    call pass_vector(OBC%rx_oblique_u, OBC%ry_oblique_v, G%Domain, To_All+Scalar_Pair)
-    call pass_vector(OBC%ry_oblique_u, OBC%rx_oblique_v, G%Domain, To_All+Scalar_Pair)
-    call pass_vector(OBC%cff_normal_u, OBC%cff_normal_v, G%Domain, To_All+Scalar_Pair)
+    call create_group_pass(OBC%pass_oblique, OBC%rx_oblique_u, OBC%ry_oblique_v, G%Domain, To_All+Scalar_Pair)
+    call create_group_pass(OBC%pass_oblique, OBC%ry_oblique_u, OBC%rx_oblique_v, G%Domain, To_All+Scalar_Pair)
+    call create_group_pass(OBC%pass_oblique, OBC%cff_normal_u, OBC%cff_normal_v, G%Domain, To_All+Scalar_Pair)
+    call do_group_pass(OBC%pass_oblique, G%Domain)
   endif
   if (allocated(OBC%tres_x) .and. allocated(OBC%tres_y)) then
     do m=1,OBC%ntr
@@ -5571,6 +5575,11 @@ subroutine remap_OBC_fields(G, GV, h_old, h_new, OBC, PCM_cell)
       enddo
     endif
   enddo ; endif ; endif
+  if (OBC%radiation_BCs_exist_globally) call pass_vector(OBC%rx_normal, OBC%ry_normal, G%Domain, &
+                     To_All+Scalar_Pair)
+  if (OBC%oblique_BCs_exist_globally) then
+    call do_group_pass(OBC%pass_oblique, G%Domain)
+  endif
 
 end subroutine remap_OBC_fields