Mongoose Traveller: Sector Fleet

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Sector Fleet
Author Martin Dougherty
Publisher Mongoose Publishing
Version Mongoose Traveller
Format Book (PDF)
Language English
Pages 136
Year Published 2010
Canonical Yes
Available from DriveThru RPG, Mongoose
Also See Grand Fleet
MGP 6172
ISBN 978-1-907218-97-2

Mongoose Traveller: Sector Fleet is a sourcebook for all versions of Traveller. Concentrating on the Imperial Navy of the Third Imperium, it presents data on naval operations, procedures and ships for many interstellar powers including the Solomani Confederation, the Julian Protectorate, and the Two Thousand Worlds.

Sector Fleet details the role and organization of an interstellar navy as well as the specifics of shipboard protocol such as command devolution, legal and illegal orders, and how much latitude a starship captain has once underway. Sector Fleet also presents details of the exact composition of an Imperial Sector and Subsector fleet; ship strengths and types, and the vital role played by reserve and Colonial forces in backing up the main strength of the Sector Fleet. The fleets of the entire Spinward Marches are described in this book.

Sector Fleet contains answers to some of the Big Questions concerning the Imperial Navy:

  • What missions does the Navy actually carry out?
  • Can a Sector Duke legally give orders to a naval Admiral?
  • How does the Navy recruit and train its personnel?
  • How many patrol ships are available in a typical subsector?
  • When the Bridge is shot away, who takes command?
  • What is the composition of a Sector Fleet?
  • When is an order illegal? Should it be obeyed anyway?
  • What jurisdiction does a corporate Route Protector have?
  • How much does an Able Spacehand get paid?
  • When a Commodore commands a single-ship force, is the Captain still in command?


Admiral of the Imperial Grand Fleet
Martin Dougherty
Commodore of the Imperial Bodyguard Squadron
Neil Frier
Chief Of Staff
Roger Calver
Inspector-Admiral of Imperial Dockyards
William Andersen
Boarding Party Members
Don McKinney, Shane McLean, Nate Zettle, Michael Taylor

Table of Contents[edit]

Mongoose Traveller:
Sector Fleet
Section Page/s
Introduction 5
Chapter 1: The Grand Fleet of the Third Imperium 8
Chapter 2: A history of the Imperial Navy 12
Chapter 3: Structure and Organization of the Grand Fleet 33
Chapter 4: Personnel 53
Chapter 5: Deployments and procedures 67
Chapter 7: The Spinward Marches sector fleet 90
Chapter 8: Opponents, allies, and Rivals 125


  1. Freelance Traveller 015
  2. Freelance Traveller 039
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