Improve ship scanners

code/modules/overmap/sectors.dm

@@ -4,6 +4,7 @@
 /obj/effect/overmap/visitable
 	name = "map object"
 	scannable = TRUE
+	scanner_desc = "!! No Data Available !!"
 
 	var/list/map_z = list()
 	var/list/extra_z_levels //if you need to manually insist that these z-levels are part of this sector, for things like edge-of-map step trigger transitions rather than multi-z complexes