Traveller News/Email tracker Plugin Details

By David
/
First published 2nd August 2026

Description

This plugin adds a shortcode to allow a user to save messages sent from a system in the Spinward Marches and to display what messages have arrived at the same system. The messages are saved in the user's browser and do not leave it.

The following assumptions are made:

  • Only covers the Spinward Marches (plus Capital and Zhdant)
  • X-boats jumps take 7 days, but don't jump further than the next system on the route even if a further system is within Jump-4
  • If two systems are Jump-3 apart then add together the population stats from their UWPs. If the total is more than 17 it's a day for a message to find a ship making the jump. If the total is more than 13, it's 23 days to find a ship and otherwise these systems only get a ship once a year. (It's worth noting here that we ignore travel code status (assume that the ship is a supply vessel of some sort) and the value of 14 allows Andory and Candory to be connected to Wonstar.
  • If two systems are Jump-2 apart then again add together the population stats from the their UWPs. Between 15 and 20 it's a day to find a ship. Between 11 and 14 it's 8 days to find a ship and otherwise it's 53 days to find a ship. (if both systemss have an A class starport that overrides the population total and we assume it's a day to find a ship)
  • If two systems are Jump-1 apart then yet again add toegther the population stats from their UWPs. If the total is more than 10 it's a day to find a ship, if the total is between 5 and 10, it's 8 days to find a ship, and otherwise it's 23 days. However the starports are also checked. If either starport is an X class starport it's 83 days to find a ship and if that's not the case but one of the starports is an A starport it's just a day to find a ship.
  • Once a ship is found it takes 7 days to make the jump and transfer any messages
  • Capital is 500 days via X-boats from the Trailing edge of the Spinward Marches. Zhdant is 255 days from Errere
  • Version: 3.360.0
  • Author: David Vines
  • Last Updated: 2026-08-16T08:46:16Z
  • Requires WordPress Version: 4.0 or higher
  • Tested up to: 7.0.4
  • License: Contains materials from Mongoose which are used by following the Mongoose fair use policy. The code elements were written solely by myself.

    The Traveller game in all forms is owned by Mongoose Publishing. Copyright 1977 - 2024 Mongoose Publishing. Traveller is a registered trademark of Mongoose Publishing. Mongoose Publishing permits web sites and fanzines for this game, provided it contains this notice, that Mongoose Publishing is notified, and subject to a withdrawal of permission on 90 days notice. The contents of this site are for personal, non-commercial use only. Any use of Mongoose Publishing’s copyrighted material or trademarks anywhere on this web site and its files should not be viewed as a challenge to those copyrights or trademarks. In addition, any program/articles/files on this site cannot be republished or distributed without the consent of the author who contributed it.

    In particular note that this page explicitly does not grant consent to republish or distribute this plugin.

Change Log

3.360.0 - 16 August 2026

If the received times are equal sort by sent times

3.357.0 - 09 August 2026

Bug fix - Broken message saving!

3.356.0 - 09 August 2026

Bug fix - ship jumps cause loop when calculating route after the initial starting point for a message

3.355.0 - 09 August 2026

Ensure all possible jumps are recorded (Some systems in the left (spinward) side of the map weren't correctly connected)

3.354.0 - 09 August 2026

Allow a Jump-3 once a year - normally this will be overtaken by Jump-1 or Jump-2 ships but some worlds have only Jump-3 neighbours - this connnects those worlds as well

3.353.0 - 09 August 2026

Add support for player ship jumps that also take messages (and can overtake the normal message transmissions)

3.352.0 - 08 August 2026

Code rework, Add edit button (Can only edit the body of messages, not the subject), rework route finding

3.351.0 - 04 August 2026

Bug Fix

3.350.0 - 04 August 2026

Add Egyrn and Pax Rulin subsectors

3.349.0 - 03 August 2026

Add XBoat skip routes in the Sword Worlds as well. Change time for Zhodani, Darrian and Sword Worlds XBoat routes to a total of 8 days since, technically, they are just trade routes rather than XBoat routes

3.348.0 - 03 August 2026

Adjust styling and add Xboat routes that jump intermediate stops (but still limited to Jump-4 of course)

3.346.0 - 02 August 2026

Fix slug

3.345.0 - 02 August 2026

Initial Version - pre-alpha


The information on this page was retrieved by Plugin Information Version 3.282.0.