out of the 3 ships you get to choose from and upgrade once you reach earth sol space dock for the first time in the gamje which ships is best do you think i chose the role of the tacticle officer give me your insite thanks also why isnt the ambassador class enterprise c available or is it available?

which ship is better and why the adv dreadnaught ent d refit or the adv heavy cruiser enterprise b

There is not best ship. Rule of thumb though is that Tactical officers fly escorts. But if you'd prefer, there's no reason you can't fly a cruiser or a science ship. Check out the tactical officers forum. A lot of tactical officers like cruisers and there's a lot of info on it if you choose to do so. Try it out, see what you like for your play style.

The Ambassador class isn't in game quite simply because the Devs haven't added it. According to the latest engineering report it is listed as "In Design Discussions" which (IIRC) means that it is not currently being worked on, but being discussed as something that could be done. So we'll probably get it, but it will be quite a while..

Odds are if there's a canon ship you saw on something-that-wasn't-a-TV-series that isn't in the game, then that canon ship you saw isn't in the game because of copyright issues.

True, but the OP asked about the Ambassador class which is cannon. The Enterprise-C (TNG:Yesterday's Enterprise) is Ambassador class.

Based on game mechanics, tactical officers do good with escort ships. However that doesn't mean you should choose an escort. My tactical officer uses a cruiser. Basically this is the run down of each ship type:

Escorts are fast and powerful with cannons
Cruisers are slow and powerful with beam weapons
Science Vessels are right in the middle of everything

I suggest taking a look at my how to choose a ship in sto guide. You may also want to compare the different sto ships.

I'll gladly answer any questions you may have. By the way, I think the Ambassador is coming sometime this year. I might be wrong though.

Quoting myself in another thread:

One tactical captain may feel more comfortable with a ship that turns slower, but has considerably more hull and shield points, or a ship that gives him/her special science abilities that come with a certain Science Ship. And another tactical captain will stick strictly to Escort type ships. It depends on playing style.

I'm talking about stats here: the turning rate, the amount of consoles, the weapon slots (and limitations), etc.

By looks is entirely another matter: the Ambassador will probably be a Cruiser ship, that is, for Engineers. So a tactical captain wanting to pilot an Ambassador will have to weigh the costs of the (degraded) playing performance against the "coolness" factor.

I'd be curious to find out what three ships the OP is choosing between when he first gets to ESD. Unless you've purchased the TOS Connie, NX-01 or Oberth from C-Store (or received one with the initial purchase of the game), your three choices are Centaur, Miranda and Shikar. Those are purely cosmetic differences.

If you've loaded up on C-Store purchases, then you may also be choosing between the Connie (eng), NX-01 (escort) or Oberth (sci). As a Lt level character, the differences between eng, sci and tact characters are marginal, and so are the practical differences between the ships. The C-store ships give you an extra console according to ship type and some fun extras, but its not going to matter what branch your character is. What matters is whether you like to see yourself as young Kirk cruising with 60's groovilicious, miniskirted yeomen (Connie), Archer exploring the pre-federation Sirius sector (NX-01), or blowing up (Oberth).

Otherwise, flip a coin.