On my drive I have a file labelled LBB:X Warships.
It started as a military systems supplement for LBB:2 - adapting stuff from every other version of Traveller to LBB:2.
Then I added a section for the alternative technologies from FF&S, MgT, GURPS and others
A section for sensors and electronic warfare
I added a section on a ship combat as part of a role playing session (what rolls should characters make during a role playing session ship combat), a section of variations on movement systems (Starter Range band, vector movement done using a template adapted from BL and AV:T
Fleet combat rules for converting ships to the counter stats you find in the boardgames I:E, I, FFW which allows me to have a system invasion scale game, which can be scaled down to squadron vs squadron or even ship vs ship.
I have another document labelled HG:3
collected house rules that I think fix ship construction
a modification to the USP
a logarithmic based battery factor so you only have one factor for each weapon system
crew quality and PC skills
maneuver options and full on maneuver rules similar to the LBB:X (it is virtually the same)
new damage resolution and damage tables - lessons learned from BR.