It is fast and manoeuvrable enough to get into a position from where its torpedoes will do most damage. However, due to its small size, large engine signature, and relatively poor armour, it does not stand up well to enemy fire. This shouldn't be a problem, however, due to the long range of a torpedo. ''Cobras'' act in squadrons of between two and six ships, making a torpedo volley from a squadron enough to cripple a large capital ship. It is the smallest independent [[Imperial]] warship, the smaller ones being carried aboard larger cruisers.{{Fn|1}} The ''Cobra'' has a pair of [[torpedo]] tubes in the prow, and a single [[weapons battery]] positioned to fire to the sides, and in front of the ship. The weapons battery is a purely defensive measure, for when the ''Cobra'' is attacked by enemy escorts. It is short-ranged, and is almost never used to attack a capital ship, as it simply is not powerful enough to do any real damage. ''Cobra'' Class Destroyers are often seen fighting alongside [[Space Marine]] formations.{{Fn|1}}

*'''Dimensions:''' 1.5  km long, 0.3  km abeam at fins (approx)

The '''Viper Class Missile Destroyer''' is a converted Cobra Destroyer. Carrying [[Boarding Torpedo]]es over their standard armament by adding more torpedo tubes, the conversion program was pushed by the [[Gareox Prerogative]]. The experiment was not a success, however, as the destroyers could not carry enough crew to man the torpedoes and fight the ship. As a result, most of the Vipers have been converted back to their standard armaments but use the extra Torpedo tubes to carry more offensive armament. These ships have since been designated as Missile Destroyers and are organized organised into separate anti-ship flotillas by the Imperial Navy. They are most often employed for mass torpedo attacks, proving ineffective in convoy protection duty.{{Fn|7}}

*''[[Act of Clarity]]'' — Personal craft of [[Canoness|Canoness-Errant]] [[Setheno]].{{Fn|12}}*''[[Honoured Prophecy]]'' - — Strike vessel. Built in [[Entelheim]] shipyard, it is owned by the [[Death Spectres]] [[Chapter]]. Its crew consists of five [[Space Marine]]s and one hundred and fifty [[Chapter Serf]]s. It has armaments meant for close support and it is used as a system reconnaissance craft.{{Fn|4}}*''[[Molech's Enlightenment]] - '' — [[Horus Heresy]]-era vessel.{{Fn|13}}*''[[Spiteful]] - '' — Rammed the [[Chaos]] [[battleship]] ''[[Agonising Death]]'' that fought at the blockade of the planet [[Garomar]]. As a result both of the spaceships were destroyed.{{Fn|8}}

*{{Endn|10}}: [http://www.games[Fanatic Online]] #[[Fanatic Online 090-099|92]] -workshop.com/gws/content/article.jsp?catId=cat1290319&categoryId=1100007&section=&aId=4300022 ''Vessels of Mars: Ships of the Adeptus Mechanicus]'', by [[Nate Montes]], [[Robert Henderson]] , and [[Ray Bell]].