diff --git a/Inst_eddies/set_max_speed.f90 b/Inst_eddies/set_max_speed.f90
index 10e3b003d9253b34e5825363cb0bd045970b849f..eea012289e5e94a4af3a0025ff6f828e052ceb8d 100644
--- a/Inst_eddies/set_max_speed.f90
+++ b/Inst_eddies/set_max_speed.f90
@@ -6,20 +6,15 @@ contains
 
   subroutine set_max_speed(e, ssh, u, v, corner, step, cont_list)
 
-    ! This procedure defines the components speed_cont, max_speed and
-    ! radius4 of argument e. On return, e%speed_cont may be a null ssh
-    ! contour but e%max_speed is never set to missing_speed. However,
-    ! e%max_speed might be NaN if speed_outerm is NaN (with any value
-    ! of e%radius4). The value of e%radius4 set here is always >=
-    ! 1. On return, if e%speed_cont is not a null ssh contour then
-    ! e%max_speed is the speed on e%speed_cont.
+    ! This procedure defines the components speed_cont and max_speed
+    ! of argument e. On return, e%speed_cont may be a null ssh contour
+    ! and e%max_speed may be set to missing_speed. However,
+    ! e%max_speed is never NaN. On return, if e%speed_cont is not a
+    ! null ssh contour then e%max_speed is the speed on e%speed_cont.
 
     ! The length of the interval of longitudes of the domain, step(1)
     ! * (size(ssh, 1) - 1), should be < 180 degrees, so that the
-    ! geometrical processing done here is non-ambiguous. The
-    ! longitudes of outside points should be in the interval
-    ! [corner(1), corner(1) + step(1) * (size(ssh, 1) - 1)] as there
-    ! will be no automatic shifting by a multiple of 360 degrees.
+    ! geometrical processing done here is non-ambiguous.
 
     use, intrinsic:: IEEE_ARITHMETIC, only: IEEE_IS_NAN