Here's the ship that I put into the orks gib us a brick page.
Basha Class Light Krooza: 90 pts
Cruiser/6 Turns:45 Shields:1 Turrets:1 SPD 25 armor 6/4
Prow Heavy Gunz: 6 front
Port/Starboard Heavy Gunz: 4L/R
Prow Gunz str: D6 30cm range
Soopa Engines
Its decent, and as much as I would like to wrap all light cruisers into one profile, I think people would try to shoot me for not having a seperate Gouga class. As well the name Gouga doesn't warrant itself well to a multitude of ship types. So in the end we will have two. The Basha (probably marauder class) as well as the gouga.
Consideration; after looking over KROOZA's conversions I may include the grabbers as an upgrade for the Kill-Kroozer. It would work exactly the same as for the Gouga, but instead replacing the prow guns and p/s heavy guns with the Klaws. However this would reduce the differences between the two ships.
There are several variants possible, even barring the fluff reasoning that all ork ships are of a small number of basic designs. As well as the lack of plausible variations amongst what we can reasonably ascertain with weapon loadouts and without doing anything strange or radical.
Basically in the case of light cruisers, this would mean an oversized savage, like the ship above,, an oversized ravager, and possibly a large onslaught. Of course there is the case for a smaller carrier as well.
As far as the cruisers/bcs go, well I've covered most possibilities with my upgrade system. Although a variant hammer with lances is justifiable. As well as a larger gouga type vessel.
These of course are just from harvesting examples already mentioned. There could be more interesting upgrades, such as a big mek instead of a warlord, who makes the ship have D3 shields instead of doubling the boarding value.(the shield value would be rolled at the beginning of every turn)
Hmm... maybe that's a good way to make the pirate fleet different, turning their warlords into freeboota kaptains, who give the ships +1 ld instead of doubling boarding value. Or give them both but limit warlords to 0-1. They'll be the most kunning orks alive! As well the warlord of course would be the fleet commander still, just because you are the smartest ork doesn't mean you're in charge!
The unfortunate thing is that currently Orks in BFG are very underrepresented. This is due a lot to the 40k players thinking that the list doesn't feel orky enough. (the HA will argue about how every ork aspect is represented in different ways). That the list itself is grossly underpowered (and most people want to feel like they have a solid chance of winning), and that they don't like the models (which I do, but this is the least of the three worries). These things have made the ork players in BFG come from a different background than those in 40k, like myself, who has never owned an ork 40k army (I actually only owned chaos, imperial guard, and a daemonhunters/witchunters army) to enjoy playing the list more.
Hopefully in this document I will be able to alleviate some of these concerns. The list will at least cover two.
I'm trying to add in some variability to the ships (of course was already represented by random firepower) to cover something that Ork players in general want. Nearly all ork sample lists have tons of options, and looking at The-Waagh's forums they had a rather complicated listing and got some ideas.