If you go to the FAQ page for the Bridgeport and Port Jefferson Steamboat Company ferry service between Connecticut and Long Island and click on "How far in advance can I make a reservation?" you will see the following:
How far in advance can I make a reservation?
Reservations can be made up to 2 hours in advance of the departure (depending on availability).
What a disaster. They've managed to answer the wrong question!
The answer states (or so it seems to me) a cutoff, namely 2 hours prior to casting off, beyond which reservations cannot be made because it is too close to the sailing time. But that would be an answer to a question like "When is the latest I could make a reservation?"
The actual question, How far in advance can I make a reservation?, is surely asking something completely different: "What is the earliest I could make a reservation?"
That is, when someone asks a question making reference how far in advance of the sailing time something can be done, they are asking for a maximum time span that has the sailing time as endpoint.
If there is any answer given here to the actual question, it is entirely implicit: it is given by a conversational implicature. Since they do give a latest time for reservations but they do not say anything about an earliest time, we infer pragmatically that there is no limit: you can reserve as far in advance as you want. You can make a reservation right now for your kids to take a centenary-celebrating trip in 2112. Sure, there might not still be such things as boats by then, but right now it looks like the Bridgeport and Port Jefferson Steamboat Company assume that there will be, and will take your reservation.
However, being pragmatic in the other sense, i.e. simply practical, I went to the reservations page, and found that here in the real world they won't do any such thing. Only the years 2012 and 2013 were available as menu choices, and I couldn't even book for 2013. The error message said "No event times are available." So I don't think you can book your 2112 travel now. Good luck to you if you want to try, though. Bon voyage.
Bob Ladd, who spotted this, thinks the matter is more complicated than I have suggested above. He had earlier noticed a sign saying that buses in Cambridge (UK) run "up to every 10 minutes", which appears to mean that they run at intervals that can get as short as 10 minutes: since here low numbers (more frequent buses) are good, "up to" means "toward the good end of the scale". Well, that may also be in play in the ferryboat case. Their "up to 2 hours in advance" could mean "as little as 2 hours in advance": It is good to have the pre-sailing cutoff time so small (just as it is good to have the Cambridge buses running so frequently). Bob suggests that it as if "Y up to X(n)", where X(n) is a phrase involving the number n, means something like "on some pragmatic scale where X(n) specifies a quantity/frequency/extent that is somehow a reasonable limit or somehow surpasses expectations, Y reaches that limit or surpasses expectations to that extent". It's clearly not necessary for Y < n — in both the Bridgeport case and the Cambridge case, Y > n.
I hope you've followed all that, because there is going to be an "up to X" question on the final.
And by the way (added 14 June 2012), note that the Port Jefferson Patch newsletter is onto this story and is awaiting the ferry company's comment. Another sign of the rapidity of movement of the news cycle.