Index: trunk/src/org/openstreetmap/josm/data/validation/tests/LongSegment.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/tests/LongSegment.java	(revision 15090)
+++ trunk/src/org/openstreetmap/josm/data/validation/tests/LongSegment.java	(revision 15093)
@@ -84,5 +84,5 @@
 
     private boolean ignoreWay(Way w) {
-        return visitedWays.contains(w) || w.hasTag("route", "ferry") || w.hasTag("bay", "fjord");
+        return visitedWays.contains(w) || w.hasTag("route", "ferry") || w.hasTag("bay", "fjord") || w.hasTag("natural", "strait");
     }
 
Index: trunk/src/org/openstreetmap/josm/data/validation/tests/UnclosedWays.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/tests/UnclosedWays.java	(revision 15090)
+++ trunk/src/org/openstreetmap/josm/data/validation/tests/UnclosedWays.java	(revision 15093)
@@ -139,5 +139,5 @@
         new UnclosedWaysCheck(1101, "natural", marktr("natural type {0}"),
             new HashSet<>(Arrays.asList("arete", "bay", "cave", "cliff", "coastline", "gorge", "gully", "peak",
-                            "ridge", "saddle", "tree", "tree_row", "valley", "volcano"))),
+                            "ridge", "saddle", "strait", "tree", "tree_row", "valley", "volcano"))),
 
         new UnclosedWaysCheck(1102, "landuse", marktr("landuse type {0}")),