Ukraine's Security Service (SBU) has unveiled the latest version of its "sea baby" naval drone that it says can operate at distances of over 1,500 km and carry a payload of up to 2,000 kg, approximately double the previous limit.The improvements mark the latest development in unmanned weapons systems that play an increasingly important role in the war with Russia, as both sides race to stay ahead in drone warfare on land, in the air and at sea.Aerial drones have dominated attention for the