fw_path_navigation: Remove explicit L1 mentioning.

src/modules/navigator/mission_block.cpp

@@ -255,7 +255,7 @@ MissionBlock::is_mission_item_reached_or_completed()
 			 * coordinates with a radius equal to the loiter_radius field. It is not flying
 			 * through the waypoint center.
 			 * Therefore the item is marked as reached once the system reaches the loiter
-			 * radius + L1 distance. Time inside and turn count is handled elsewhere.
+			 * radius + navigation switch distance. Time inside and turn count is handled elsewhere.
 			 */
 
 			// check if within loiter radius around wp, if yes then set altitude sp to mission item

src/modules/navigator/navigator_main.cpp

@@ -1177,7 +1177,7 @@ float Navigator::get_acceptance_radius()
 	float acceptance_radius = get_default_acceptance_radius(); // the value specified in the parameter NAV_ACC_RAD
 	const position_controller_status_s &pos_ctrl_status = _position_controller_status_sub.get();
 
-	// for fixed-wing and rover, return the max of NAV_ACC_RAD and the controller acceptance radius (e.g. L1 distance)
+	// for fixed-wing and rover, return the max of NAV_ACC_RAD and the controller acceptance radius (e.g. navigation switch distance)
 	if (_vstatus.vehicle_type != vehicle_status_s::VEHICLE_TYPE_ROTARY_WING
 	    && PX4_ISFINITE(pos_ctrl_status.acceptance_radius) && pos_ctrl_status.timestamp != 0) {
 

src/modules/navigator/navigator_params.c

@@ -58,7 +58,7 @@ PARAM_DEFINE_FLOAT(NAV_LOITER_RAD, 80.0f);
  * Acceptance Radius
  *
  * Default acceptance radius, overridden by acceptance radius of waypoint if set.
- * For fixed wing the L1 turning distance is used for horizontal acceptance.
+ * For fixed wing the npfg switch distance is used for horizontal acceptance.
  *
  * @unit m
  * @min 0.05