Several questions? Where's the ship's apostis (parexeiresia), that is, its outrigger? We shouldn't believe those proponents who say that Phoenician (and Roman) vessels didn't carry one! The width of the ships would've been grotesque compared to the length, i e a completely illogical and, for warships highly ineffectual length/beam ratio. Also, its sides are too high, causing a disturbing and dangerous instability. Also, the stern looks a tad awkward. I've never seen any image or inscription depicting ancient war vessels with such a stern. And, lastly, you may consider rearranging the oar rows, since I believe you may have wanted to depict an early (8th-7th c. BC) penteconter, i e a fifty, where you hade (this is the most accepted theory, for lack of hard evidence!) 25 oarsmen a side, arranged on two levels, with (probably) thirteen on the upper level (zygioi or zygites) and twelve on the lower level, i e in the hull (thranitai), which would equal 25 pairs of oars. Alternatively you could find examples that had the following configuration: 14 zygites on the upper level; eleven thranites on the lower. This oar-system was called dikrotos, as opposed to the trikrotos system of the later Threes. This was undoubtedly the most common war vessel before the introduction of the triereis (or trireme) in the 5th c. BC. Finally, I would suggest that the bow or prow with the rather starkly protruding ram should be made less exaggerated and with a softer upward bottom (keel) flare. Also the mast appears to be way too far back. Since ancient mariner relied heavily on the fore-and-aft sail structure with relative simple rigging, making it hard to sail close-hauled to the wind, they positioned the mast (if carrying only one) as much forward as possibly without jeopardizing the ship's inherent stability. And, and this is the final remark: where's the ship's steering oar? We know from inscriptions etc, that these ships indeed had two over-sized oars situated either side of the Pentarch's seat aft. These oars were handled only by the most experienced seamen in the fleet! These helmsmen were called keleustes, and possessed a very high reputation.
My Avatar:Петр Алексеевич Безобразов (Petr Alekseevich Bezobrazov), Вице-адмирал , царская ВМФ России(1845-1906) - I sign my drawings as Ari Saarinen