The first 21 seconds of the Star Trek: Voyager episode "Relativity" show the Utopia Planitia ship yards for the first time in Star Trek. During these 21 seconds I counted at least 15 ships which can be seen in drydock. Which ships have identifying characteristics which let us pinpoint their classes, and what are they (where the ship is seen, identifying characteristic and class)?
In particular, a few people have noticed a Galaxy-class ship at some point during this sequence. (In fact, there's a rumour that it's actually the Enterprise-D being refitted in between TNG and Generations.) Others noticed an Ambassador-class ship. But I can't exactly pinpoint where they are in the sequence and how we know they are of those classes.