diff --git a/engines/titanic/star_control/star_camera.cpp b/engines/titanic/star_control/star_camera.cpp
index 392c53e2029d..a46225661045 100644
--- a/engines/titanic/star_control/star_camera.cpp
+++ b/engines/titanic/star_control/star_camera.cpp
@@ -228,11 +228,13 @@ void CStarCamera::setViewportAngle(const FPoint &angles) {
 		return;
 
 	if (_matrixRow == -1) {
+		// No locked markers
 		FPose subX(X_AXIS, angles._y);
 		FPose subY(Y_AXIS, angles._x);
 		FPose sub(subX, subY);
 		proc22(sub);
 	} else if (_matrixRow == 0) {
+		// 1 marker is locked in
 		FVector row1 = _matrix._row1;
 		FPose subX(X_AXIS, angles._y);
 		FPose subY(Y_AXIS, angles._x);
@@ -316,6 +318,7 @@ void CStarCamera::setViewportAngle(const FPoint &angles) {
 		_viewport.setOrientation(m1);
 		_viewport.setPosition(tempV1);
 	} else if (_matrixRow == 1) {
+		// 2 markers locked in
 		FVector tempV2;
 		DMatrix m1, m2, sub;
 		DVector mrow1, mrow2, mrow3;
@@ -504,7 +507,7 @@ void CStarCamera::fn2(FVector v1, FVector v2, FVector v3) {
 		v3.normalize();
 		tempV.normalize();
 
-		DMatrix matrix = _viewport.getOrientation();
+		FMatrix matrix = _viewport.getOrientation();
 		const FVector &pos = _viewport._position;
 		_mover->proc10(v3, tempV, pos, matrix);
 
diff --git a/engines/titanic/star_control/star_control_sub21.h b/engines/titanic/star_control/star_control_sub21.h
index ba16aa7c5d8d..3b804d95fff4 100644
--- a/engines/titanic/star_control/star_control_sub21.h
+++ b/engines/titanic/star_control/star_control_sub21.h
@@ -35,7 +35,11 @@ class CStarControlSub21 : public CCameraMover {
 	CStarControlSub21(const CNavigationInfo *src);
 	virtual ~CStarControlSub21() {}
 
+	/**
+	 * Start a movement to a given specified destination
+	 */
 	virtual void moveTo(const FVector &srcV, const FVector &destV, const FMatrix &orientation);
+
 	virtual void proc10(const FVector &v1, const FVector &v2, const FVector &v3, const FMatrix &m);
 
 	/**