Add nautical miles, fathoms, and yards

macrovision.js

@@ -82,6 +82,16 @@ math.createUnit("timezones", {
     prefixes: "long",
     aliases: ["timezone", "timezones"]
 });
+math.createUnit("nauticalMiles", {
+    definition: "6080 feet",
+    prefixes: "long",
+    aliases: ["nauticalMile", "nauticalMiles"]
+});
+math.createUnit("fathoms", {
+    definition: "6 feet",
+    prefixes: "long",
+    aliases: ["fathom", "fathoms"]
+});
 
 math.createUnit("earths", {
     definition: "12756km",
@@ -317,7 +327,9 @@ const unitChoices = {
         "customary": [
             "inches",
             "feet",
+            "yards",
             "miles",
+            "nauticalMiles",
         ],
         "relative": [
             "humans",
@@ -340,7 +352,8 @@ const unitChoices = {
             "points",
             "smoots",
             "furlongs",
-            "HUs"
+            "HUs",
+            "fathoms",
         ]
     },
     area: {