diff --git a/html/planeObject.js b/html/planeObject.js
index 239baec..a2919f7 100644
--- a/html/planeObject.js
+++ b/html/planeObject.js
@@ -3036,7 +3036,7 @@ function routeDoLookup(currentTime) {
         })
         .fail((jqxhr, status, error) => {
             g.route_check_in_flight = false;
-            g.route_cache_timer =  Date.now()/1000 + 15;
+            g.route_next_lookup =  Date.now()/1000 + 15;
             console.log('route API request error, delaying next request by 15 seconds.');
         });
 }
diff --git a/html/script.js b/html/script.js
index c672337..5c1e0ce 100644
--- a/html/script.js
+++ b/html/script.js
@@ -10,7 +10,7 @@ g.planesOrdered = [];
 g.route_cache = [];
 g.route_check_todo = {};
 g.route_check_in_flight = false;
-g.route_cache_timer = new Date().getTime() / 1000 + 1; // one second from now
+g.route_next_lookup = 0;
 
 g.mapOrientation = mapOrientation;
 
@@ -5741,9 +5741,9 @@ function checkMovement() {
     }
 
     let currentTime = new Date().getTime()/1000;
-    if (currentTime > g.route_cache_timer && !g.route_check_in_flight) {
+    if (currentTime > g.route_next_lookup && !g.route_check_in_flight) {
         // check if it's time to send a batch of request to the API server
-        g.route_cache_timer = currentTime + 1;
+        g.route_next_lookup = currentTime + 1;
         routeDoLookup(currentTime);
     }