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 HS-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.
• They share a very similar mission with Monitors.
• 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-7 to 15.

Image Repository

Type HSL Light System Defense Boat:

1. A heavily armored Arden class SDB.
   

Type HSVL Very Light System Defense Boat:

1. A side view of a Type SB class System Defense Boat.
   
2. A Drakkon class System Defense Boat.
   
3. The Flash class System Defense Boat is part of many an effective COACC system.
   
4. A Caryatid class System Defense Boat coming into a spaceyard for routine maintenance..
   
5. A Dragon class System Defense Boat in action safeguarding a gas giant from marauders wanting to perform wilderness refueling.
   
6. The Scorpion class System Defense Boat was once a big seller to many a Planetary Navy.
   
7. The Wasp class System Defense Boat has been sold widely throughout Charted Space.
   

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:
Largecraft, Smallcraft & Bigcraft:

HSL-class System Defense Boat Supraclass Archetypes
Archetype	Type Code
Defenders	(HS)
Defensive Ship	(HS)
Gunboats	(EG)
Heavy System Defense Boat	(HSH)
Light System Defense Boat	(HSL)
Medium System Defense Boat	(HSM)
Missile Boats	(HS)
Superheavy System Defense Boat	(HSS)
System Defense Boat	(HS) (Namesake)
System Missile Defense Boat	(HS)
System Defense Craft	(HS)
System Defense Ship	(HS)
Ultraheavy System Defense Boat	(HSU)
Very Light System Defense Boat	(HSVL)

Size-Class Roles for System Defense Boats

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
System Defense Boat	HS	Flash class System Defense Boat	None. H = Defender / Security S = Security
Heavy System Defense Boat	HSH	None	None. (250,000 to 499,999 tons) H = Heavy
Light System Defense Boat	HSL	Purvaine class System Defense Boat	None. (2,500 to 99,999 tons) L = Light
Medium System Defense Boat	HSM	None	None. (100,000 to 249,999 tons) M = Medium
Superheavy System Defense Boat	HSS	None	None. (500,000 to 999,999 tons) S = Superheavy
Ultraheavy System Defense Boat	HSU	None	None. (1,000,000 or more tons) U = Ultraheavy
Very Light System Defense Boat	HSVL	Dragon class System Defense Boat	None. (100 to 2,499 tons) V = Very Light, Escort, etc.

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 Vessel - Defensive Vessel - System Defense Boat:
Type HSB class System Defense Boat AKA Type SB class System Defense Boat

1. Type HSH class Heavy System Defense Boat
   1. None

Paramilitary Vessel - Defensive Vessel - System Defense Boat:
Type HSB class System Defense Boat AKA Type SB class System Defense Boat

1. Type HSL class Light System Defense Boat
   1. Arden class System Defense Boat
   2. Chiang class System Defense Boat
   3. Hive Protector class System Defense Boat
   4. Oromet class System Defense Boat
   5. Purvaine class System Defense Boat
   6. Rim Republic class System Defense Boat
   7. Tristar class System Defense Boat
   8. Val Marin class System Defense Boat
   9. Yunus class System Defense Boat
   10. Zydeterranal class System Defense Boat

Paramilitary Vessel - Defensive Vessel - System Defense Boat:
Type HSB class System Defense Boat AKA Type SB class System Defense Boat

1. Type HSM class Medium System Defense Boat
   1. None

Paramilitary Vessel - Defensive Vessel - System Defense Boat:
Type HSB class System Defense Boat AKA Type SB class System Defense Boat

1. Type HSS class Supraheavy System Defense Boat
   1. None

Paramilitary Vessel - Defensive Vessel - System Defense Boat:
Type HSB class System Defense Boat AKA Type SB class System Defense Boat

1. Type HSU class Ultraheavy System Defense Boat
   1. None

Paramilitary Vessel - Defensive Vessel - System Defense Boat:
Type HSB class System Defense Boat AKA Type SB class System Defense Boat

1. Type HSVL class Very Light System Defense Boat
   1. Avoram class System Defense Boat
   2. Caryatid class System Defense Boat
   3. Condor class System Defense Boat
   4. Dragon class System Defense Boat
   5. Drakkon class System Defense Boat
   6. Dzegkno class System Defense Boat
   7. Eclipse Serpens class Light System Defense Boat
   8. Exarch class System Defense Boat
   9. Farnex class System Missile Defense Boat
   10. Fazachu class System Defense Boat
   11. Flash class System Defense Boat
   12. Frundsberg class System Defense Boat
   13. Grunt class System Defense Boat
   14. Gundong class System Defense Boat
   15. Harrier class System Defense Boat
   16. Holdfast class Heavy System Defense Boat
   17. Jugendworld class System Defense Boat
   18. K1074 class Heavy System Defense Boat
   19. K282 class Heavy System Defense Boat
   20. K56 class System Defense Boat
   21. Khanate class System Defense Boat
   22. Kuomsi class System Defense Boat
   23. Nassin class System Defense Boat
   24. Penner class System Defense Boat
   25. Pounce class System Defense Boat
   26. Ramrod class Missile Boat
   27. Reginald class System Defense Boat
   28. Ronix class Asteroid Patrol Boat
   29. Roye class System Defense Boat
   30. Scorpion class System Defense Boat
   31. Sentry class System Defense Boat
   32. Shukugan class System Defense Boat
   33. Stedlas class System Defense Boat
   34. Thele class System Defense Boat
   35. Torch class System Defense Boat
   36. Wasp class System Defense Boat
   37. Wolvesbane class System Defense Boat
   38. Wyvern class System Defense Boat
   39. Wyrm class System Defense Boat
   40. Zhodatl class System Defense Boat
   41. Zhodq class System Defense Boat
   42. Zydpedallion class System Defense Boat
   43. Zydpharn class System Defense Boat

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

8 Representative Light System Defense Boat (HSL) 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 Rim Republic class System Defense Boat HSL 9 5,000 0 6 Rim Republic 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

0 Representative Medium System Defense Boat (HSM) Classes
No results

0 Representative Heavy System Defense Boat (HSH) Classes
No results

0 Representative Supraheavy System Defense Boat (HSS) Classes
No results

0 Representative Ultraheavy System Defense Boat (HSU) Classes
No results

3 Representative Very Light System Defense Boat (HSVL) 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 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

References & Contributors (Sources)

This page uses content from Wikipedia. The original article was at Coastal_defence_ship. The list of authors can be seen in the page history. The text of Wikipedia is available under the Commons Attribution-ShareAlike 3.0 Unported License.

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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.

• This article is an amalgamation of many different materials published since 1977.
• 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