diff --git a/src/usng.ts b/src/usng.ts
index 3224348..bd41703 100755
--- a/src/usng.ts
+++ b/src/usng.ts
@@ -176,7 +176,6 @@ extend(Converter.prototype, {
   ECC_PRIME_SQUARED: undefined,
   ECC_SQUARED: undefined,
 
-  num100kSets: 6,
   originRowLetters: 'AFAFAF',
   UTMGzdLetters: "NPQRSTUVWX",
   USNGSqEast: "ABCDEFGHJKLMNPQRSTUVWXYZ",
@@ -1205,14 +1204,6 @@ extend(Converter.prototype, {
 
   },
 
-  get100kSetForZone: function(zoneNumber) {
-    var setParm = zoneNumber % this.num100kSets;
-    if (setParm == 0)
-      setParm = this.num100kSets;
-
-    return setParm;
-  },
-
   getNorthingFromChar: function(letter, setVal) {
     if (letter === '' || typeof letter === 'undefined') {
       return 0;