diff --git a/src/lib/commands/scut.c b/src/lib/commands/scut.c
index 8d542832..deb04d5e 100644
--- a/src/lib/commands/scut.c
+++ b/src/lib/commands/scut.c
@@ -165,7 +165,7 @@ scuttle_tradeship(struct shpstr *sp, int interactive)
 
     mp = &mchr[(int)sp->shp_type];
     getsect(sp->shp_x, sp->shp_y, &sect);
-    if (sect.sct_own && sect.sct_type == SCT_HARBR) {
+    if (sect.sct_own && sect.sct_type == SCT_HARBR && sect.sct_effic >= 2) {
 	dist = mapdist(sp->shp_x, sp->shp_y,
 		       sp->shp_orig_x, sp->shp_orig_y);
 	/* Don't disclose distance to to pirates */