diff --git a/src/RadarMarpa.cpp b/src/RadarMarpa.cpp
index ac2539fc..193ecdda 100644
--- a/src/RadarMarpa.cpp
+++ b/src/RadarMarpa.cpp
@@ -688,6 +688,7 @@ void ArpaTarget::RefreshTarget(int dist) {
    }*/
 
   // PREDICTION CYCLE
+
   m_position.time = time1;                                                // estimated new target time
   delta_t = ((double)((m_position.time - prev_X.time).GetLo())) / 1000.;  // in seconds
   if (m_status == 0) {
@@ -712,7 +713,9 @@ void ArpaTarget::RefreshTarget(int dist) {
     return;
   }
   m_expected = pol;  // save expected polar position
-  // Measurement cycle
+
+  //MEASUREMENT CYCLE
+
   // now search for the target at the expected polar position in pol
   int dist1 = dist;
   Polar back = pol;
@@ -880,13 +883,14 @@ void ArpaTarget::RefreshTarget(int dist) {
 bool ArpaTarget::FindNearestContour(Polar* pol, int dist) {
   // make a search pattern along a square
   // returns the position of the nearest blob found in pol
-  // dist is search radius (1 more or less)
+  // dist is search radius (1 more or less) in radial pixels
   int a = pol->angle;
   int r = pol->r;
   if (dist < 2) dist = 2;
   for (int j = 1; j <= dist; j++) {
     int dist_r = j;
     int dist_a = (int)(326. / (double)r * j);  // 326/r: conversion factor to make squares
+	                                       // if r == 326 circle would be 28 * PI * 326 = 2048
     if (dist_a == 0) dist_a = 1;
     for (int i = 0; i <= dist_a; i++) {  // "upper" side
       PIX(a - i, r + dist_r);            // search starting from the middle
diff --git a/src/RadarMarpa.h b/src/RadarMarpa.h
index 329b4eb2..cb12a924 100644
--- a/src/RadarMarpa.h
+++ b/src/RadarMarpa.h
@@ -51,8 +51,8 @@ class Position;
 #define TARGET_SEARCH_RADIUS2 (15)  // radius of target search area for pass 1
 #define SCAN_MARGIN (150)           // number of lines that a next scan of the target may have moved
 #define SCAN_MARGIN2 (1000)         // if target is refreshed after this time you will be shure it is the next sweep
-#define MAX_CONTOUR_LENGTH (601)    // defines maximal size of target contour
-#define MAX_TARGET_DIAMETER (200)   // target will be set lost if diameter larger than this value
+#define MAX_CONTOUR_LENGTH (601)    // defines maximal size of target contour in pixels
+#define MAX_TARGET_DIAMETER (200)   // target will be set lost if diameter in pixels is larger than this value
 #define MAX_LOST_COUNT (3)          // number of sweeps that target can be missed before it is set to lost
 
 #define FOR_DELETION (-2)  // status of a duplicate target used to delete a target
diff --git a/src/navico/NavicoReceive.h b/src/navico/NavicoReceive.h
index 454b5b4e..59fe10a5 100644
--- a/src/navico/NavicoReceive.h
+++ b/src/navico/NavicoReceive.h
@@ -56,8 +56,8 @@ class NavicoReceive : public RadarReceive {
     m_receive_socket = GetLocalhostServerTCPSocket();
     m_send_socket = GetLocalhostSendTCPSocket(m_receive_socket);
     SetInfoStatus(wxString::Format(wxT("%s: %s"), m_ri->m_name.c_str(), _("Initializing")));
-
-    LOG_RECEIVE(wxT("radar_pi: %s receive thread created"), m_ri->m_name.c_str());
+	SetPriority(wxPRIORITY_MAX);
+    LOG_INFO(wxT("radar_pi: %s receive thread created, prio= %i"), m_ri->m_name.c_str(), GetPriority());
   };
 
   ~NavicoReceive() {}