Defense Outpost 337 was a Federation outpost, an R1 Invictus-class defense outpost space station. In Starfleet service in the later 23rd century, around the 2280s decade, this defense station was located on the border of the Romulan Neutral Zone. (FASA RPG module: Regula-1 Orbital Station Deckplans)

Federation outposts
Various facilities	Epsilon Ceti Outpost • Outpost Hadrian • Science Outpost D5 • Outpost Seran T-1 • Two Dawns		Archives	Daystrom One • Memory Alpha • Memory Beta • Memory Gamma • Memory Delta • Memory Epsilon • Memory Prime • Symphony Alpha	Mining facilities	Beta Argola mining outpost (Beta Argola) • BorSitu Minor mining outpost (Borsitu Minor) • DSE-Grissom • Alpha • Beta • Gamma • Delta • Omicron • Theta • Epsilon
Planetary outposts	771 • Archanis IV research outpost (Archanis IV) • Babel Station (Babel) • Boradis III outpost (Boradis III) • Bunker (Earth) • Calder II outpost (Calder II) • Caleb IV outpost (Caleb IV) • Cestus III Outpost (Cestus III) • Darwin Genetic Research Station (Gagarin IV) • Delta VII outpost (Delta VII) • Elaphe Vulpina IX outpost (Elaphe Vulpina IX) • Ellison Research Outpost (Gateway) • Ennis Outpost • Eridian Vault (Eris) • Facility 18 (New Montana) • Fort Fed (Tenkara) • Haven Facility (Vesuvi VI) • Outpost Hunter (Delta Vega) • Ohniaka III outpost (Ohniaka III) • Obsidian outpost (Obsidian) • Prometheus Science Center • Setlik III outpost (Setlik III) • Sowtha depot (Sowtha) • Starfleet Headquarters (Earth) • Outpost T-22 (Kalandra Minor) • Thraz Outpost • Vostok Academy (Mercury) • ULAPG42821DB (Psi 2000)
Space station outposts	40 • 47 • 61 • Ariadne 1 • Asimov Center • Avogadro Center • Avril Station • Babel Orbital Center • Benecia Medical Station • BiblioTech 1 • Boundary 1 • Bova Center • Bradbury Center • Brahms Center • Brin Center • Brundage Point Listening Station • Clanhaven 1 • Cochrane Center • Chriton Center • Clark Center • Compassion 1 • Daystrom Center • Doppler Center • Espoir Station • Facility 4028 • Frege Center • Gamma Hydra 1 • Ipicran 1 • Gibson Center • Heinlein Center • Huxley Center • Station Kel-Artis • Linden Navigational Outpost • Manheim Temporal Research Facility • Maximus 1 • Mercy 1 • Mertens Orbital Research Station • Niven Center • Othello 1 • Parley Point 1 • Planck Center • Pournelle Center • Sagan Center • Sarak Center • Simmons Center • Soong Center • Terra 1 • Unitas 1 • Unity Point 1 • Ursis Load A-1 • Ursis Load B-1 • Verne Center • Welles Center
	Federation Defense Outposts	6 • 18 • 29 • 36 • 43 • 44 • 60 • 85 • 89 • 91 • 102 • 112 • 148 • 157 • 194 • 216 • 229 • 238 • 248 • 287 • 323 • 337 • 361 • 366 • 372 • 375 • 396 • 417 • 438 • 457 • 498 • 507 • 524 • 545 • 573 • 579 • 581 • 602 • 607 • 608 • 629 • 665 • 724 • 735 • 768 • 780 • 797 • 856 • 859 • 893 • 930 • 1038 • 1051 • 1121 • 1204 • 1237 • 1286 • 1317 • 1378 • 1426 • 1427 • 1428 • 1520			Outer Sector Defense Outposts	1 • 4
	Intelligence stations	Bargrik 1 • Bugblatter 1 • Charybdis 1 • Chimera 1 • Dragon Lady 1 • Fafnir 1 • Gammorah 1 • Ghidrah 1 • Grendel 1 • Gritchin 1 • Hyde 1 • Mothra 1 • Namu 1 • Nightmare 1 • Nosferatu 1 • Pennywise 1 • Polladori 1 • Poltergeist 1 • Raven 1 • Rodan 1 • Sasquatch 1 • Scylla 1 • Shadow 1 • Snark 1 • Tingler 1 • T'prelki 1 • Typhon 1 • Vermithrax 1 • Vlad 1 • Wief 1
	Romulan Neutral Zone Outposts	Earth Outpost Stations: 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 32 • Foxtrot Outposts: I • II • III • IV • V • VI • VII • VIII • IX • X • XI • XII • XIII • Quebec Outposts: 1 • 2 • 3 • 4 • 5 • 6 • Romeo Outposts: 1 • 2 • 3 • Sierra Outposts: 1 • 2 • 3 • 4 • 5 • 6 • 7 • Tango Outposts: 1 • 2 • 3 • 4 • Watchtowers: 13
	Gamma Outposts	7	Delta Outposts	1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9	Epsilon Outposts	1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11
	Deep space research facility	39	FCO Outposts	47	Jupiter Outposts	92 • Jupiter Station • Ganymede Station
	Processing facilities	057 • 156 • 295 • 406 • 409 • 645 • 684 • 786	Relay stations	47	Trading stations	549 • 680 • 1059 • 1080 • 8243 • 9400 • 9835 • 9874