Subsector

The Subsector is a mapping unit in Astrography, an area within a Sector.

• Sixteen subsectors form a sector.
• The average density of much of Charted Space is about 30 to 40 worlds per subsector.
• It is a kind of Metric mostly used in political astrography.

Description (Specifications)

The subsector is used by most spacefarers and is one of the astrographic measures of naval defense.

Strategic Subsector Defense

Many defensive fleets are allocated at the subsector level. Such a fleet is known as Subsector Navy. It is considered a basic military formation. They are typically controlled by a Subsector Duke, Subsector Duchess, or Saarpuhii. Under the system of Feudal Confederation, control of such armed forces is shared by the central government (Third Imperium) and the local government (Subsector Duke). Bonds of honor and fealty are the binding factor. Such bonds sometimes fail or break.

Subsector Arrangement

Subsectors are commonly arranged in the following patterns by IISS regulation:

Subsector Arrangement
Coreward
A	B	C	D
E	F	G	H
I	J	K	L
M	N	O	P
Rimward

Subsector Numerical Sequencing

Subsectors are noted within a Sector by their position using the first sixteen letters of the alphabet (A-P).

• A specific numerical sequence is associated with each subsector.

Subsectors Numerical Sequences
Subsector	Column 1	Column 2	Column 3	Column 4	Column 5	Column 6	Column 7	Column 8	Remarks
A	0101 - 0110	0201 - 0210	0301 - 0310	0401 - 0410	0501 - 0510	0601 - 0610	0701 - 0710	0801 - 0810	This subsector forms a corner of the larger sector.
B	0901 - 0910	1001 - 1010	1101 - 1110	1201 - 1210	1301 - 1310	1401 - 1410	1501 - 1510	1601 - 1610	This subsector forms an coreward edge of the larger sector.
C	1701 - 1710	1801 - 1810	1901 - 1910	2001 - 2010	2101 - 2110	2201 - 2210	2301 - 2310	2401 - 2410	This subsector forms an coreward edge of the larger sector.
D	2501 - 2410	2601 - 2610	2701 - 2710	2801 - 2810	2901 - 2910	3001 - 3010	3101 - 3110	3201 - 3210	This subsector forms a corner of the larger sector.
E	0111 - 0120	0211 - 0220	0311 - 0320	0411 - 0420	0511 - 0520	0611 - 0620	0711 - 0720	0811 - 0820	This subsector forms an spinward edge of the larger sector.
F	0911 - 0920	1011 - 1020	1111 - 1120	1211 - 1220	1311 - 1320	1411 - 1420	1511 - 1520	1611 - 1620	This subsector forms internal part of the larger sector. It is more difficult for interstellar corsairs to operate here.
G	1711 - 1720	1811 - 1820	1911 - 1920	2011 - 2020	2111 - 2120	2211 - 2220	2311 - 2320	2411 - 2420	This subsector forms internal part of the larger sector. It is more difficult for interstellar corsairs to operate here.
H	2511 - 2420	2611 - 2620	2711 - 2720	2811 - 2820	2911 - 2920	3011 - 3020	3111 - 3120	3211 - 3220	This subsector forms an trailing edge of the larger sector.
I	0121 - 0130	0221 - 0230	0321 - 0330	0421 - 0430	0521 - 0530	0621 - 0630	0721 - 0730	0821 - 0830	This subsector forms an spinward edge of the larger sector.
J	0921 - 0930	1021 - 1030	1121 - 1130	1221 - 1230	1321 - 1330	1421 - 1430	1521 - 1530	1621 - 1630	This subsector forms internal part of the larger sector. It is more difficult for interstellar corsairs to operate here.
K	1721 - 1730	1821 - 1830	1921 - 1930	2021 - 2030	2121 - 2130	2221 - 2230	2321 - 2330	2421 - 2430	This subsector forms internal part of the larger sector. It is more difficult for interstellar corsairs to operate here.
L	2521 - 2430	2621 - 2630	2721 - 2730	2821 - 2830	2921 - 2930	3021 - 3030	3121 - 3130	3221 - 3230	This subsector forms an trailing edge of the larger sector.
M	0131 - 0140	0231 - 0240	0331 - 0340	0431 - 0440	0531 - 0540	0631 - 0640	0731 - 0740	0831 - 0840	This subsector forms a corner of the larger sector.
N	0931 - 0940	1031 - 1040	1131 - 1140	1231 - 1240	1331 - 1340	1431 - 1440	1531 - 1540	1631 - 1640	This subsector forms an rimward edge of the larger sector.
O	1731 - 1740	1831 - 1840	1931 - 1940	2031 - 2040	2131 - 2140	2231 - 2240	2331 - 2340	2431 - 2440	This subsector forms an rimward edge of the larger sector.
P	2531 - 2440	2631 - 2640	2731 - 2740	2831 - 2840	2931 - 2940	3031 - 3040	3131 - 3140	3231 - 3240	This subsector forms a corner of the larger sector.

NOTES:

• In addition, they are named and may be called by a variety of synonyms for subsector, including province, cluster, or district.
• Imperial convention is to assign numbers to districts (for example, District 268) which are under Imperial protection pending integration into the Imperium.

History & Background (Dossier)

The subsector is the most active unit of interstellar commerce and government. Outside of a subsector, the limitations of governance and communications technology significantly limit all but the most high level societal interactions. In a very applied sense, the subsector is the basic community of Charted Space. The vast majority of gentlesophonts live their entire lives in just a single subsector.

References & Contributors (Sources)

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.

• John Harshman, Marc Miller, Loren Wiseman. Library Data (N-Z) (Game Designers Workshop, 1982), TBD. (Classic Traveller Supplement 11)
• Marc Miller. The Traveller Book (Game Designers Workshop, 1982), TBD.
• Marc Miller. Marc Miller's Traveller (Imperium Games, 1996), 186.
• Traveller Wiki Editorial Team
• Author & Contributor: Lord (Marquis) and Master of Sophontology Maksim-Smelchak of the Ministry of Science