diff --git a/libraries/AP_GPS/AP_GPS.h b/libraries/AP_GPS/AP_GPS.h
index 10f56fbc68..5357efc06f 100644
--- a/libraries/AP_GPS/AP_GPS.h
+++ b/libraries/AP_GPS/AP_GPS.h
@@ -115,7 +115,7 @@ public:
         float ground_course;                ///< ground course in degrees
         uint16_t hdop;                      ///< horizontal dilution of precision in cm
         uint16_t vdop;                      ///< vertical dilution of precision in cm
-        uint8_t num_sats;                   ///< Number of visible satelites        
+        uint8_t num_sats;                   ///< Number of visible satellites        
         Vector3f velocity;                  ///< 3D velocitiy in m/s, in NED format
         float speed_accuracy;
         float horizontal_accuracy;
diff --git a/libraries/AP_GPS/AP_GPS_PX4.cpp b/libraries/AP_GPS/AP_GPS_PX4.cpp
index fc59bf224d..23ba8aab84 100644
--- a/libraries/AP_GPS/AP_GPS_PX4.cpp
+++ b/libraries/AP_GPS/AP_GPS_PX4.cpp
@@ -75,7 +75,7 @@ AP_GPS_PX4::read(void)
 
                 if (_gps_pos.time_utc_usec == 0) {
                   // This is a work-around for https://github.com/PX4/Firmware/issues/1474
-                  // reject position reports with invalid time, as APM adjusts it's clock after the first lock has been aquired
+                  // reject position reports with invalid time, as APM adjusts it's clock after the first lock has been acquired
                   state.status = AP_GPS::NO_FIX;
                 }
             }
diff --git a/libraries/AP_GPS/AP_GPS_SBF.cpp b/libraries/AP_GPS/AP_GPS_SBF.cpp
index e0e60e63cf..ea967471c9 100644
--- a/libraries/AP_GPS/AP_GPS_SBF.cpp
+++ b/libraries/AP_GPS/AP_GPS_SBF.cpp
@@ -215,7 +215,7 @@ AP_GPS_SBF::process_message(void)
 
         state.hdop = last_hdop;
 
-        // Update velocity state (dont use −2·10^10)
+        // Update velocity state (don't use −2·10^10)
         if (temp.Vn > -200000) {
             state.velocity.x = (float)(temp.Vn);
             state.velocity.y = (float)(temp.Ve);
@@ -234,7 +234,7 @@ AP_GPS_SBF::process_message(void)
             state.have_vertical_accuracy = true;
         }
 
-        // Update position state (dont use −2·10^10)
+        // Update position state (don't use −2·10^10)
         if (temp.Latitude > -200000) {
             state.location.lat = (int32_t)(temp.Latitude * RAD_TO_DEG_DOUBLE * 1e7);
             state.location.lng = (int32_t)(temp.Longitude * RAD_TO_DEG_DOUBLE * 1e7);
diff --git a/libraries/AP_GPS/AP_GPS_SBP.cpp b/libraries/AP_GPS/AP_GPS_SBP.cpp
index 3b5ddc98f6..376fa26939 100644
--- a/libraries/AP_GPS/AP_GPS_SBP.cpp
+++ b/libraries/AP_GPS/AP_GPS_SBP.cpp
@@ -214,7 +214,7 @@ AP_GPS_SBP::_sbp_process_message() {
 
         case SBP_TRACKING_STATE_MSGTYPE:
             //INTENTIONALLY BLANK
-            //Currenly unhandled, but logged after switch statement.
+            //Currently unhandled, but logged after switch statement.
             break;
 
         case SBP_IAR_STATE_MSGTYPE: {
diff --git a/libraries/AP_GPS/AP_GPS_UBLOX.cpp b/libraries/AP_GPS/AP_GPS_UBLOX.cpp
index 20315fa7f2..d183fe5270 100644
--- a/libraries/AP_GPS/AP_GPS_UBLOX.cpp
+++ b/libraries/AP_GPS/AP_GPS_UBLOX.cpp
@@ -17,7 +17,7 @@
 //
 //  u-blox GPS driver for ArduPilot
 //	Origin code by Michael Smith, Jordi Munoz and Jose Julio, DIYDrones.com
-//  Substantially rewitten for new GPS driver structure by Andrew Tridgell
+//  Substantially rewritten for new GPS driver structure by Andrew Tridgell
 //
 #include "AP_GPS.h"
 #include "AP_GPS_UBLOX.h"