diff --git a/src/main/tracker/pitlab.c b/src/main/tracker/pitlab.c
index 1c51560..4aa4c5f 100644
--- a/src/main/tracker/pitlab.c
+++ b/src/main/tracker/pitlab.c
@@ -94,18 +94,18 @@ void preProcessHexString(void){
 void processPitlabFrame(void){
 	switch(lsRxData[0])
 	{
-	case 0:
+	case 0: // A
 		telemetry_sats = (uint16_t)Restore_byte(4);
 		break;
-	case 1:
-		telemetry_alt = (int16_t)Restore_short(2);
+	case 10: // 10 = K, pos 3 : Absolute altitude, 1 = B, pos 2 : Relative altitude
+		telemetry_alt = (int16_t)Restore_short(3);
 		gotAlt = true;
 		break;
-	case 2:
+	case 2: // C
 		gps_lon = Restore_long(1);
 		telemetry_lon = (int32_t)(round(((double)gps_lon * 100.0)/60.0));
 		break;
-	case 3:
+	case 3: // D
 		gps_lat = Restore_long(1);
 		telemetry_lat = (int32_t)(round(((double)gps_lat * 100.0)/60.0));
 		if(telemetry_sats >= 5) gotFix = true;