My question (at long last) is this: If your ship generally only stops over in a system for one week, how are you meant to handle this? Either you "get lucky" and find a clue, or you just shrug and leave system? Or should you hang around possibly for months, losing money on the hopes that you'll run into a rumor?
The Ref can always "force" a rumor, of course, to jump start an adventure. But, how it can be handled (and how I think it is intended to be handled) is for the rumor list not to be consulted for more than once per time period suggested. So, if it is a week, then only one attempt per week is used. And, if that means the ship only calls on the planet once every three months, then that's when they hear whatever rumor is rolled.
In the old days of gaming (D&D had adventures like this, too), there was a lot of randomness.
If I wanted to run this "by the book", I'd rely on the trading mini-game. I'd let the players go where they wanted to go. I'd roll for cargoes and passengers. And, the PCs would just travel from place to place until someone did something impromptu on a world (picked a fight in a starport bar, for example), or until the players heard a rumor--that would set the adventure in a new direction.
Many times, the rumors heard were not on the same world. The PCs speak with other Travellers. So, the rumor could refer to another world.
I remember Twilight's Peak starting off this way.
You can easily run the ship through a few worlds with the players, rolling for cargoes using Books 1-3 (not Book 7 as, when running this quickly, you don't need to know what the cargo is--just how much cargo and how much you got for freight). Maybe the players would do some speculation. And, about the time this got old at the gaming table, someone would hear a rumor.
Running it by the book, I'd just roll on the rumor chart as the players went to that world (or where the rumor could be heard), and once I knew what the rumor was, I'd find a way to roleplay it into the stop-over.
Random play can be quite fun. Roll for cargo. Roll for passengers. The Ref really has no idea where the game is going. In space, roll for a random ship encounter. On worlds, roll for a random encounter. Roll for a rumor. With NPCs, roll their reaction. Use the Law Level to roll for a legal encounter (anything from, "Hey, it's a 200Cr fine for spitting out your gum!", to "Your external baffle plate is out of spec. We won't OK clearance for you to leave until you fix it, and your berthing fee jumps by a factor of ten after a week.")
You can throw for Patron encounters, Animal encounters, Adventure encounters, too.
Situations grow out of these random things. I've had some very fun game sessions like this in the past.
Really, it's not too much unlike an adventure like Across the Bright Face/Mission on Mithril where the players are just exploring hexes, and the Ref is throwing for random encounters.
If I wanted to use the generic Rumors matrix from page 101 of TTB, I'd just do it like this.
It's says once a week the table is consulted. And, typically, ships stay in port a week and are in jump a week.
While in port, I'd throw on the rumor chart. Let's say I get a result of 63. That's rumor J - Completely False Information.
Here, I'd put my thinking cap on, as a Ref. (I like this kind of stuff.) What, I would wonder, should I give the players false information about? I'd look for roleplaying opportunities to mislead the players. I won't know what the subject is until I stumble upon it. As we role play, I'd just find something--usually something dramatic and/or something important to the player involved.
In jump, I'd roll again on the rumor table. And, this time (the following week), I roll a 21, which is rumor B - Minor Fact.
Here, I get creative. I've got to give the player a minor fact. So, I say, "As you were browsing the entertainment library, looking for something to pass the time off duty, you stumble across a news article that announces that Revnun Jacobsoni, the designer of the V2B Baffle plates, was found dead. You check the date, and you see it is now been almost a year....(Minor Fact).
...then why did that port yardsman you spoke with at your last port say that he actually had dinner with the guy just last week? (Player finds out about the Completely False Information from last week.)
And now, we're off to the races...
What does it all mean?
I dunno?
But, it will be fun finding out.
That's what random, dice roll gaming is all about.