Added Captain's Jacket to the Captain's Closet. Chinsky showed me how to do this, so I don't know how well it was done.

code/game/objects/structures/crates_lockers/closets/secure/security.dm

@@ -16,6 +16,7 @@
 		else
 			new /obj/item/weapon/storage/backpack/satchel_cap(src)
 		new /obj/item/clothing/suit/captunic(src)
+		new /obj/item/clothing/suit/captunic/trek(src)
 		new /obj/item/clothing/head/helmet/cap(src)
 		new /obj/item/clothing/under/rank/captain(src)
 		new /obj/item/clothing/suit/armor/vest(src)

code/modules/clothing/suits/jobs.dm

@@ -21,6 +21,11 @@
 	body_parts_covered = UPPER_TORSO|LOWER_TORSO|LEGS|ARMS
 	flags_inv = HIDEJUMPSUIT
 
+/obj/item/clothing/suit/captunic/trek
+	name = "captain's uniform jacket"
+	desc = "A less formal jacket for everyday captain use."
+	icon_state = "capjacket"
+
 //Chaplain
 /obj/item/clothing/suit/chaplain_hoodie
 	name = "chaplain hoodie"