+extern int shp_usable_guns(struct shpstr *);
+extern double shp_torp_hitchance(struct shpstr *, int);
+
+/* src/lib/subs/shpsub.c */
+extern int shp_may_nav(struct shpstr *, struct shpstr *, char *);
+extern void shp_sel(struct nstr_item *, struct emp_qelem *);
+extern struct ulist *shp_insque(struct shpstr *, struct emp_qelem *);
+extern void shp_nav_stay_behind(struct emp_qelem *, natid);
+extern void shp_nav_put(struct emp_qelem *, natid);
+extern int shp_sweep(struct emp_qelem *, int, int, natid);
+extern enum shp_stuck shp_check_nav(struct shpstr *, struct sctstr *);
+extern int sect_has_dock(struct sctstr *);
+extern int shp_hardtarget(struct shpstr *);
+extern int shp_nav_dir(struct emp_qelem *, int, natid);
+extern int shp_nav_gauntlet(struct emp_qelem *, int, natid);
+extern int shp_missile_defense(coord, coord, natid, int);
+extern void shp_missdef(struct shpstr *, natid);
+extern double shp_mobcost(struct shpstr *);
+extern void shp_set_tech(struct shpstr *, int);