The Armstrong Siddeley

Mr Willbourn of Stentor Industries, raygun and prop-weapon maker of no small repute, has constructed the above Steampunk device for protecting Her Majesty’s new airship division from the burgeoning (and scurrilous) pirate contingent of the lighter than air international traffic.  The Horatio Boarder Repeller is designed for hand use, and fires both a sonic blast for stunning your terribly impolite foes, but a near-impossibly thin harpoon function for really showing your enemies that you refuse to be boarded!  Lovely work, Mr Willbourn!