Makes the station Z level into a list instead of a single define

code/modules/shuttle/navigation_computer.dm

@@ -1,7 +1,7 @@
 /obj/machinery/computer/camera_advanced/shuttle_docker
 	name = "navigation computer"
 	desc = "Used to designate a precise transit location for a spacecraft."
-	z_lock = ZLEVEL_STATION
+	z_lock = ZLEVEL_STATION_PRIMARY
 	jump_action = null
 	var/datum/action/innate/shuttledocker_rotate/rotate_action = new
 	var/datum/action/innate/shuttledocker_place/place_action = new

code/modules/shuttle/shuttle.dm

@@ -410,7 +410,7 @@
 	mode = SHUTTLE_RECALL
 
 /obj/docking_port/mobile/proc/enterTransit()
-	if(SSshuttle.lockdown && z == ZLEVEL_STATION)	//emp went off, no escape
+	if(SSshuttle.lockdown && (z in GLOB.station_z_levels))	//emp went off, no escape
 		return
 	previous = null
 //		if(!destination)
@@ -574,7 +574,7 @@
 
 		if(move_mode & MOVE_AREA)
 			areas_to_move[old_area] = TRUE
-		
+
 		old_turfs[place] = move_mode
 
 	/*******************************************All onShuttleMove procs******************************************/

code/modules/shuttle/supply.dm

@@ -45,7 +45,7 @@ GLOBAL_LIST_INIT(blacklisted_cargo_types, typecacheof(list(
 	SSshuttle.supply = src
 
 /obj/docking_port/mobile/supply/canMove()
-	if(z == ZLEVEL_STATION)
+	if(z in GLOB.station_z_levels)
 		return check_blacklist(shuttle_areas)
 	return ..()
 

code/modules/shuttle/syndicate.dm

@@ -47,7 +47,7 @@
 	desc = "Used to designate a precise transit location for the syndicate shuttle."
 	icon_screen = "syndishuttle"
 	icon_keyboard = "syndie_key"
-	z_lock = ZLEVEL_STATION
+	z_lock = ZLEVEL_STATION_PRIMARY
 	shuttleId = "syndicate"
 	shuttlePortId = "syndicate_custom"
 	shuttlePortName = "custom location"