diff --git a/lib/Lacuna/Constants.pm b/lib/Lacuna/Constants.pm
index dcb9b2ca..a3bf91b9 100644
--- a/lib/Lacuna/Constants.pm
+++ b/lib/Lacuna/Constants.pm
@@ -122,7 +122,14 @@ use constant SHIP_TRADE_TYPES => (qw(
 use constant SHIP_WASTE_TYPES => (qw(
     scow scow_fast scow_large scow_mega
 ));
-
+use constant SHIP_SINGLE_USE_TYPES => (qw( probe short_range_colony_ship colony_ship spy_pod space_station 
+                                        mining_platform_ship terraforming_platform_ship surveyor
+                                        gas_giant_settlement_ship snark snark2 snark3 thud
+                                        supply_pod supply_pod2 supply_pod3 supply_pod4 supply_pod5
+                                        drone spy_shuttle observatory_seeker security_ministry_seeker 
+                                        spaceport_seeker excavator detonator scanner stake
+                                        placebo placebo2 placebo3 placebo4 placebo5 placebo6 bleeder fissure_sealer
+                                        ));
 our @EXPORT_OK = qw(
     INFLATION
     SECONDS_IN_A_DAY