In the cutscene of the Awoken's attack on the Dreadnought, Mara Sov's flagship had a double-barrel turret on her ship, which is not present on other Ketches. This got me wondering if your average Ketch has any in-built weapons. There's several small circular openings on the hull of the ship that could be weapon ports, but AFAIK it's unknown if these could be weapons. On a related note, is it safe to assume that a Ketch can accommodate at least 6 Skiffs, given that during public events we tend to see 5 fly by alongside the Ketch while the one that will initiate the event descends on the area? This number could rise to 7 if we consider that the Fallen Walker public event involves 2 Skiffs: the first one drops troops before the second one with the Walker itself arrives.