System Defense Boat

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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:

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» Solomani Parsec

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» Imperial Standard Parsec

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

Type HSB System Defense Boat:

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. The Flash class System Defense Boat is part of many an effective COACC system.
   
5. A Caryatid class System Defense Boat coming into a spaceyard for routine maintenance..
   
6. 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 (HS)
2. Defensive Ship (HS)
3. Gunboats (HS)
4. Heavy System Defense Boat (HSH)
5. Light System Defense Boat (HSL)
6. Medium System Defense Boat (HSM)
7. Missile Boats (HS)
8. Superheavy System Defense Boat (HSS)
9. System Defense Boat (HS) (Namesake)
10. System Defense Craft (HS)
11. System Defense Ship (HS)
12. Ultraheavy System Defense Boat (HSU)
13. 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	TBD class SDB	None. (250,000 to 499,999 tons) H = Defender / Security S = Security
Heavy System Defense Boat	HSH	TBD class SDB	None. (250,000 to 499,999 tons) H = Heavy
Light System Defense Boat	HSL	TBD class SDB	None. (2,500 to 99,999 tons) L = Light
Medium System Defense Boat	HSM	TBD class SDB	None. (100,000 to 249,999 tons) M = Medium
Superheavy System Defense Boat	HSS	TBD class SDB	None. (500,000 to 999,999 tons) S = Superheavy
Ultraheavy System Defense Boat	HSU	TBD class SDB	None. (500,000 to 999,999 tons) U = Ultraheavy
Very Light System Defense Boat	HSVL	TBD class SDB	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 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. Torch class System Defense Boat
   36. Val Marin class System Defense Boat
   37. Wolvesbane class System Defense Boat
   38. Wyvern class System Defense Boat
   39. Wyrm class System Defense Boat
   40. Yunus class System Defense Boat
   41. Zhodatl class System Defense Boat
   42. Zhodq class System Defense Boat
   43. Zydeterranal class System Defense Boat
   44. Zydpedallion class System Defense Boat
   45. 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

39 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 Arden class Heavy System Defense Boat HSDB 8 2,900 0 5 Federation of Arden No. Unpublished, non-canon fan design. HSDB-02S50 Caryatid class System Defense Boat HSB 14 500 0 5 Third Imperium No. Unpublished, non-canon fan design. TBD Condor class System Defense Boat HSB 15 500 0 6 Non-Aligned Yes. Published, canon starship design. TBD Condor class System Defense Boat HSB 15 500 0 6 Non-Aligned Yes. Published, canon starship design. HSB-ES11 Condor class System Defense Boat HSVL 15 500 0 6 Non-Aligned Yes. Published, canon starship design. TBD Dragon class System Defense Boat HSB 12 400 0 6 Third Imperium Yes. Published, canon starship design. HSB-4S60 Dragon class System Defense Boat HSB 12 400 0 6 Third Imperium Yes. Published, canon starship design. HSB-DS60 Dragon class System Defense Boat HSVL 12 400 0 6 Third Imperium Yes. Published, canon starship design. HSB-4S60 Drakkon class System Defense Boat HSVL 11 400 0 6 Distant Fringe No. Unpublished, non-canon fan design. SB-DA60 Eclipse Serpens class Light System Defense Boat HSVL 13 2,000 0 6 Talokan Armed Forces TBD Flash class System Defense Boat HSB 15 200 0 6 Third Imperium Yes. Published, canon starship design. HSB-BS60 Flash class System Defense Boat HSL 15 200 0 6 Third Imperium Yes. Published, canon starship design. HSB-BS60 Flash class System Defense Boat HSL 15 200 0 6 Third Imperium Yes. Published, canon starship design. HSL-BS60 Harrier class System Defense Boat HSVL 12 600 0 6 Distant Fringe No. Unpublished, non-canon fan design. TBD K282 class Heavy System Defense Boat HSVL 12 1,200 0 6 Principality of Caledon No. Unpublished, non-canon fan design. TBD Nassin class System Defense Boat HSVL 9 2,000 0 6 Rimward Federation No. Unpublished, non-canon fan design. TBD Reginald class System Defense Boat HSB 10 200 0 6 Non-Aligned No. Unpublished, non-canon fan design. HSB-AP60 Reginald class System Defense Boat HSL 10 200 0 6 Non-Aligned No. Unpublished, non-canon fan design. HSB-AP60 Reginald class System Defense Boat HSL 10 200 0 6 Non-Aligned No. Unpublished, non-canon fan design. HSL-AP60 Roye class System Defense Boat HSVL 10 100 0 6 Non-Aligned No. Unpublished, non-canon fan design. HSL-AP60 Scorpion class System Defense Boat HSDB 15 2,000 0 6 Third Imperium Yes. Published, canon starship design. HSDB-VS60 Scorpion class System Defense Boat HSDB 15 2,000 0 6 Third Imperium Yes. Published, canon starship design. HSDB-VS60 Scorpion class System Defense Boat HSVL 15 2,000 0 6 Third Imperium Yes. Published, canon starship design. HSDB-VS60 Shukugan class System Defense Boat HSB 12 400 0 6 Third Imperium Yes. Published, canon starship design. HSB-DS60 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 Torch class System Defense Boat HSB 15 200 0 20 Third Imperium No. Unpublished, non-canon fan spaceship design. HSB-BAJ0 Torch class System Defense Boat HSL 15 200 0 20 Third Imperium No. Unpublished, non-canon fan spaceship design. HSB-BAJ0 Torch class System Defense Boat HSL 15 200 0 20 Third Imperium No. Unpublished, non-canon fan spaceship design. HSL-BAJ0 Torch class System Defense Boat HSVL 15 200 0 20 Third Imperium No. Unpublished, non-canon fan spaceship design. HSB-BAJ0 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 HSB 10 700 0 6 Yeeshim (world) No. Unpublished, non-canon fan design. HSB-05S60 Wasp class System Defense Boat HSDB 15 1,000 0 6 Third Imperium Yes. Published, canon starship design. HSDB-KS60 Wasp class System Defense Boat HSDB 15 1,000 0 6 Third Imperium Yes. Published, canon starship design. HSDB-KS60 Yunus class System Defense Boat HSL 8 3,300 0 5 Khuur League No. Unpublished, non-canon fan design. TBD

References & Contributors (Sources)

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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 Mongoose Publishing 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