diff --git a/sc2/src/sc2code/ships/blackurq/blackurq.c b/sc2/src/sc2code/ships/blackurq/blackurq.c
index eaaa2ad33..688232793 100644
--- a/sc2/src/sc2code/ships/blackurq/blackurq.c
+++ b/sc2/src/sc2code/ships/blackurq/blackurq.c
@@ -164,7 +164,7 @@ buzztrack_preprocess (PELEMENT ElementPtr)
 		}
 		else
 		{
-#define ACTIVATE_RANGE SPACE_WIDTH
+#define ACTIVATE_RANGE 224 /* Originally SPACE_WIDTH */
 			SIZE delta_x, delta_y;
 			ELEMENTPTR eptr;
 
diff --git a/sc2/src/sc2code/ships/slylandr/slylandr.c b/sc2/src/sc2code/ships/slylandr/slylandr.c
index 7e2dcea42..49565250c 100644
--- a/sc2/src/sc2code/ships/slylandr/slylandr.c
+++ b/sc2/src/sc2code/ships/slylandr/slylandr.c
@@ -307,7 +307,8 @@ PELEMENT ElementPtr;
 				&& !GRAVITY_MASS (ObjPtr->mass_points)
 				&& CollisionPossible (ObjPtr, ElementPtr))
 		{
-#define HARVEST_RANGE (SPACE_HEIGHT * 3 / 8)
+//HARVEST_RANGE was originally (SPACE_HEIGHT * 3 / 8)
+#define HARVEST_RANGE (208 * 3 / 8)
 			SIZE dx, dy;
 
 			if ((dx = ObjPtr->next.location.x
diff --git a/sc2/src/sc2code/ships/syreen/syreen.c b/sc2/src/sc2code/ships/syreen/syreen.c
index 208a7feb6..d5f4221c0 100644
--- a/sc2/src/sc2code/ships/syreen/syreen.c
+++ b/sc2/src/sc2code/ships/syreen/syreen.c
@@ -186,17 +186,18 @@ spawn_crew (PELEMENT ElementPtr)
 					dy = -dy;
 				dx = WORLD_TO_DISPLAY (dx);
 				dy = WORLD_TO_DISPLAY (dy);
-				if (dx <= SPACE_HEIGHT && dy <= SPACE_HEIGHT
+#define ABANDONER_RANGE 208 /* originally SPACE_HEIGHT */
+				if (dx <= ABANDONER_RANGE && dy <= ABANDONER_RANGE
 						&& (d_squared = (DWORD)((UWORD)dx * (UWORD)dx)
 						+ (DWORD)((UWORD)dy * (UWORD)dy)) <=
-						(DWORD)((UWORD)SPACE_HEIGHT * (UWORD)SPACE_HEIGHT))
+						(DWORD)((UWORD)ABANDONER_RANGE * (UWORD)ABANDONER_RANGE))
 				{
 #define MAX_ABANDONERS 8
 					COUNT crew_loss;
 
 					crew_loss = ((MAX_ABANDONERS
-							* (SPACE_HEIGHT - square_root (d_squared)))
-							/ SPACE_HEIGHT) + 1;
+							* (ABANDONER_RANGE - square_root (d_squared)))
+							/ ABANDONER_RANGE) + 1;
 					if (crew_loss >= ObjPtr->crew_level)
 						crew_loss = ObjPtr->crew_level - 1;