This has no particular game system, and is a narrative RPG set on the Akira-class USS RIGEL (NCC 80175) in 2406 (29 years post-endgame).
The rules are:
You write your own character's doings, and anything directly involved (i.e. conversations, fight scenes, the ingenious 'what happens when I do this...' (helm turning the ship, the ship moves...or doesn't), the GM (me) does the rest)
I am God. What I say goes. However, if my character isn't in the room...
This is the 'Through-deck, 15 torpedo tube' Akira class. Twelve Quantum Rapid-fire and three transphasic tubes for this period. Twenty-four fighters.
It's on the border of Federation space with the Breen, who remained agressive after the Dominion War.
It is part of Battlegroup Green. Twenty-five independent vessels stationed around Starbase 710.

Post characters like so:
Name(Race/Place of Birth/Gender)
Office (Science, tactical etc.)
Age (EARTH YEARS!)
Details (Postings, promotion dates etc.)

EXAMPLE (my character)
Brian James Hargreaves (Human Terran(Milton Keynes, England) Male)
Vessel Captain, USS Rigel 2406-
37 years old
Training finished 2390
Ensign, USS YEAGER 2390-2392
Lieutenant (JG), USS YEAGER 2392-2395
Lieutenant, USS YEAGER 2395-2397
Lieutenant, USS KITHARU 2397-2400
Lieutenant Commander (Tactical officer) USS HEPHESTAEUS 2400-2403
Commander (First Officer) USS HEPHAESTUS 2403-2405