System Defense Boat

Line Combatants (Primary - Capital)				Escort Combatants (Secondary - Subcapital)				Military Auxiliary (Tertiary)
B- Battleship	C- Cruiser	O- Ortillery	V- Carrier	D- Destroyer	E- Escort	F- Fighter	H- Defense/Security	I- Combat Transport	Q- Combat Support	S- Scout	U- Utility	X- Commo	Z- Special

Mercantile Commercial Ships (Trade & Profit)				Non-Mercantile Commercial Ships (Industry & Profit)					Non-Commercial Ships (Nonprofit)			System Craft (Intrastellar)
A- Tramp	M- Freighter	R- Liner	T- Transport	G- Industrial	J- Prospector	K- Expedition	P- Corsair	U- Utility	L- Science	N- Medical	Y- Private	WB- Barge	WA- Satellite	WO- Space Station

A HSB-class System Defense Boats are a defensive spaceship supraclass.

• SDBs are generally considered paramilitary vessels even when in military service since they don't perform an offensive role.
• They are grouped as H-class Security Vessels.
• SDBs come in a number of guises: capital ships, planetoid hulls, sentries, dreadnoughts (monitors), smallcraft, bigcraft, and more.
• They are non-starships specifically intended for defensive operations inside a star system.

Library Data Referral Tree

Please see the following AAB Library Data articles for more information:
Starship:

• Starship User Types
  • Civilian Ship
  • Military Ship
  • Non-Commercial Vessel
  • Paramilitary Ship

• Advanced Ship Classifications
  • Ship Mission Code / Supraclass
  • Ship Type Code / Superclass
  • Ship Class Code / Class
  • Model (TL)
  • Bloc (Lot)

• Basic Ship Classifications
  • Adventure Class Ship
  • Battle Class Ship
  • Capital Ship
  • Fleet Class Ship
  • Size-Role Classification
  • Subcapital Ship
  • QSP
  • USP
  • World Class Ship

• Ships by Function
  • Bigcraft
  • Boat
  • Capital Ship
  • Largecraft
  • Non-starship
  • Smallcraft
  • Spaceplane
  • Spaceship
  • Starship
  • Subcapital Ship
  • Subcraft
  • System Craft
  • Warship

Speed of Travel

• Astronomical Unit (AU)
• FTL
• Light Speed (c)
• Light-week (lw)
• Light-year (ly)
• NAFAL (STL)
• Parsec (pc)

Description (Specifications)

Most System Defense Boats (SDB's) range in size from 100 to 10,000 tons and are constructed at all tech levels from TL-8 to 15.

Image Repository

1. A side view of a Type SB class System Defense Boat.
   
2. A Drakkon class System Defense Boat.
   
3. A heavily armored Arden class SDB.
   
4. A Dragon class System Defense Boat in action safeguarding a gas giant from marauders wanting to perform wilderness refueling.
   

Strategy & Tactics (Doctrine)

SDBs most often operate according to predetermined plans designed to optimize their defensive potential. SDBs are typically stationed at the vital points of a system including gas giants, asteroid belts, major worlds, and so on. Because SDBs usually have no jump drives, shifting them from system to system can be a problem. Some types have jump shuttles which fit to the craft and provide jump capability. Another method is simple transport in large bulk cargo containers; the SDBs are loaded into 10,000-ton or 20,000-ton bulk carriers for the multi-parsec journey. This method, of course, is not recommended if immediate combat is expected at the destination.

Supraclass Roles

SDBs typically serve the following roles:

1. Defenders (HSB)
2. Defensive Ship (HSB)
3. Gunboats (HSB)
4. Missile Boats (HSBM)
5. System Defense Boat (HSB) (Namesake)
6. System Defense Craft (HSB)
7. System Defense Ship (HSB)

Size-Class Roles for Cruiser Vessels

1. Utility Craft (U) (1 to 99 tons)
2. Very Light System Defense Boat (HSVL) (100 to 2,499 tons)
3. Light System Defense Boat (HSL) (2,500 to 99,999 tons)
4. Medium System Defense Boat (HSM) (100,000 to 249,999 tons)
5. Heavy System Defense Boat (HSH) (250,000 to 499,999 tons)
6. Superheavy System Defense Boat (HSS) (500,000 to 999,999 tons)
7. Ultraheavy System Defense Boat (HSU) (1,000,000 or more tons)

Military Subcraft

Military subcraft (...both smallcraft and bigcraft) are carried by some of these vessels:

1. Battle Rider (BR)
2. Combat Barge (WBG)
3. Combat Transport Smallcraft (UI)
4. Fighters (F)
5. Militarized Utility Craft (UQ)

Supraclass Archetypes

There are hundreds of different types, depending upon the specific mission for which they are designed.

System Defense Boat Supraclass Archetypes
Archetype	Type Code	Exemplar	Remarks
TBD	HSB	TBD	None

History & Background (Dossier)

SDB's were developed on the principle that a non-starship, because of the additional armament made possible by its lack of jump drives, can ordinarily defeat a jump-capable starship of equal tonnage.

Selected Variant Types & Classes

Paramilitary Vessels - System Defense Boats:

1. Type HSB class System Defense Boat AKA Type SB class System Defense Boat
   1. Able class War Rocket
   2. Arden class System Defense Boat
   3. B-46 class Attack Torpedo Boat
   4. Bandersnatch class System Defense Boat
   5. Bando class Attack Boat
   6. Caryatid class System Defense Boat
   7. Chiang class System Defense Boat
   8. Cudin class Attack Boat
   9. Dassa class Attack Boat
   10. Dragon class System Defense Boat
   11. Dzegkno class System Defense Boat
   12. Fazachu class System Defense Boat
   13. Flash class System Defense Boat
   14. Fringian System Defense Boat
   15. Frundsberg class System Defense Boat
   16. Gundong class System Defense Boat
   17. Harrier class System Defense Boat
   18. Holdfast class Heavy System Defense Boat
   19. Jugendworld class System Defense Boat
   20. Khanate class System Defense Boat
   21. Nassin class System Defense Boat
   22. Oromet class System Defense Boat
   23. Penner class System Defense Boat
   24. Roye class System Defense Boat
   25. Scorpion class System Defense Boat
   26. Sentry class System Defense Boat
   27. Sheppard class Patrol Rocket
   28. Shukugan class System Defense Boat
   29. Sirocco Converge class Attack Boat
   30. Stedlas class System Defense Boat
   31. Temakurm class Attack Boat
   32. Thele class System Defense Boat
   33. Tigershark class Patrol Boat
   34. Tristar class System Defense Boat
   35. Val Marin class System Defense Boat
   36. Wolvesbane class System Defense Boat
   37. Wyvern class System Defense Boat
   38. Wyrm class System Defense Boat
   39. Yunus class System Defense Boat
   40. Zhodatl class System Defense Boat
   41. Zhodq class System Defense Boat
   42. Zydeterranal class System Defense Boat
   43. Zydpedallion class System Defense Boat
   44. Zydpharn class System Defense Boat

Paramilitary Vessels - Monitors:

1. Type TBD class Monitor
   1. Archipelago class System Monitor
   2. Cabon class System Monitor
   3. Colby class Monitor
   4. Donnager class Monitor
   5. Empress Troyhune class Planetoid Monitor
   6. Guardian class Asteroid Monitor
   7. Guardian class Monitor
   8. Harris class Monitor
   9. Hukkert class Monitor
   10. Khaar's Will class System Monitor
   11. Knuckle Head class System Defense Monitor
   12. MacHeany class Monitor
   13. Methuselah class System Defense Monitor
   14. Nexus Warden class System Monitor
   15. Obsidian class Asteroid Monitor
   16. Peset class Asteroid Monitor
   17. Porton class Asteroid Monitor
   18. Quesha FR-6 class Buffered Asteroid Monitor
   19. Sable class Heavy System Defense Monitor
   20. SH2K Frost G class Medium Asteroid Monitor
   21. SH7K Fromaag class Heavy Asteroid Monitor
   22. Shiishu class Monitor]
   23. Sirocco Converge class Attack Boat
   24. Stormrider class Monitor
   25. Temarn class Asteroid Monitor
   26. Thaakh class Monitor
   27. Uffan class Monitor

Paramilitary Vessels - Tenders:

1. Type TBD class Tender
   1. Arachnae class System Defense Boat Tender
   2. Daprolix class Battle Tender
   3. Fringian Military Ship Transporter
   4. Garin class Light Carrier
   5. Jacent Capital class Fleet Tender
   6. Leset class Fleet Tender
   7. Merant class Fleet Tender
   8. Monica class Battle Tender
   9. Oromet Delight class Fleet Tender
   10. Saeda class Fleet Tender
   11. Syndrome class Fleet Tender
   12. Yedidah class Fleet Tender

Paramilitary Vessels - Jump Shuttles:

1. Type TBD class Jump Shuttle
   1. Volare class Jump Shuttle
   2. WP-768 class Jump Shuttle
2. Type JS class Jump Ship
   1. Brown class Jump Ship

Ship Summary List

11 Representative System Defense Boat (HS) Classes

Class Mission Code TL Tons Jump G Origin Canon Quick ship profile Class Mission Code TL Tons Jump G Origin Canon Quick ship profile Eclipse Serpens class Light System Defense Boat HSVL 13 2,000 0 6 Talokan Armed Forces TBD Rim Republic class System Defense Boat HSL 9 5,000 0 6 Rim Republic No. Unpublished, non-canon fan design. TBD Thele class System Defense Boat HSVL 9 800 0 6 Firstworlds No. Unpublished, non-canon fan design. TBD Thele class System Defense Boat HSVL 9 800 0 6 Firstworlds No. Unpublished, non-canon fan design. TBD Val Marin class System Defense Boat HSL 10 3,000 0 6 High Senate No. Unpublished, non-canon fan design. Val Marin class System Defense Boat HSL 10 3,000 0 6 High Senate No. Unpublished, non-canon fan design. Val Marin class System Defense Boat HSL 10 3,000 0 6 High Senate No. Unpublished, non-canon fan design. Val Marin class System Defense Boat HSL 10 3,000 0 6 High Senate No. Unpublished, non-canon fan design. Val Marin class System Defense Boat HSL 10 3,000 0 6 High Senate No. Unpublished, non-canon fan design. Vernon Powell class System Defense Boat HSL 10 700 0 6 Yeeshim (world) No. Unpublished, non-canon fan design. HSL-05S60 Yunus class System Defense Boat HSL 8 3,300 0 5 Khuur League No. Unpublished, non-canon fan design. TBD

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References & Contributors (Sources)

This article is missing content for one or more detailed sections. Additional details are required to complete the article. You can help the Traveller Wiki by expanding it.

This list of sources was used by the Traveller Wiki Editorial Team and individual contributors to compose this article. Copyrighted material is used under license from Far Future Enterprises or by permission of the author. The page history lists all of the contributions.

• Supplement 9 Fighting Ships
• Deck Plan 6: Dragon-class SDB
• Journal of the Travellers Aid Society No. 9
• 'Technical Booklet' Brilliant Lances
• Traveller: The New Era Main Rulebook (pg. 373)
• Deck Plans Seeker Gaming Systems: System Defense Boat and Jump Shuttle
• Journal of the Travellers' Aid Society 09
• Bryan Steele. Traders and Gunboats (Mongoose Publishing, 2008), TBD.
• Traveller Wiki Editorial Team
• Author & Contributor: Lord (Marquis) and Master of Sophontology Maksim-Smelchak of the Ministry of Science