some background...
Battle off Aubrey Island, March 31st, 1888
On one of its nearly endless patrols, the armored cruiser SMS
Kaiser Ferdinand Max sighted smoke clouds on the horizon.
Using its new tethered balllon, observers discovered three french armored cruisers and one protected cruiser escorting transports.
Linienschiffskapitän Vaclav Touska followed established doctrine and signalled 'enemy in sight' - but due to the new radio equipment of his vessel faster than ever before - and without the french ships knowing.
Onboard the Fleet flagship
Habsburg, orders were given and transmitted. Two cruiser groups, each consisting of a protected and two small cruisers were ordered to rendevouz with the
Kaiser Ferdinand Max.
Two days later, the protected cruisers
Novara and
Custoza with the small cruisers
Wien, Lemberg, Olmütz and
Laibach closed in on the
Ferdinand Max , first guided by wireless signals, then by a signalling light directed towards the approaching vessels.
The ships stayed out of sight from the french force, with their last position before sundown checked from the balloon - as every day before.
This time, however, the night would be different.
The small cruisers would start a torpedo run against the armored cruisers drung the night, while the armored cruiser would stand in to support them with artillery fire as soon as the torpedoes hit.
The small cruisers closed in and launched their torpedoes as planned wthout being detected, but before the first fish could hit their targets, SMS
Custoza was discovered and fired upon by the french armored cruiser
Jena. Nevertheless, the torpedo salvo was already on its way and demonstrated value of such an attack. Three torpedoes hit the armored cruiser
Austerlitz, which blew up immediately. Two more hit the
Jena, but only one exploded, causing shock damage to her boillers, reducing her speed. Only one torpedo hit the protected cruiser
Lyon, but the vessels' extensive torpedo protection system prevented heavy damage.
The french armored cruisers fired at the
Custoza, which suffered an unlucky hit in her steering gear and could not evade the french salvos.
After some minutes of heavy bombardment, a shell found her torpedo depot and sank her with nealy all hand in an enormous explosion that rivalled that of the
Austerlitz some minutes before.
In the meantime, the
Ferdinand Max fired at the third armored cruiser, the
Marengo. The artillery duel ended well for the
Ferdinand Max, because her smaller, but quick-firing guns were able to penetrate the light turret armor of the heavy guns of the french cruiser. This permited her to stay out of range of
Marengo's medium guns while destroying her superstructure and engines. Unable to fire or escape, the crew left the ship after setting self-destruct charges to the magazines.
A long range torpedo fired by the
Lyon barely missed the
Novara but hit SMS
Laibach. The detonation tore its bow off, a bulkhead held long enough for a part of the crew to escape.
Novara fired at
Lyon, but a lucky hit to her range finder prevented anything better than random hits on the french cruiser.
The french captain managed to shake off the pursuing austrian cruisers during the night.
Onboard the
Jena, the engineers tried to repair parts of her boiler damage, enabling her to increase speed. Her artillery kept the unprotected cruisers away at first, but the
Lemberg managed to put one more topedo into
Jena's side. This was too much for the ship, she began to sink slowly, a tribute to her internal subdivision. While the crew disliked it for making their way throughout the ship complicated, the hated obstackle course now saved many of them from drowning.
At dawn, the austrian cruisers held the field and, having conducted search and rescue operations, dispersed to look for the transports
These despite scattering after the first torpedos hit the
Austerlitz, were found quickly and, after no more firing than warning shots, directed to Miramare.
Onboard were parts of a french army divinsion and their equipment on the way to Dai Viet...
All army equipment was removed, but not being willing to feed the prisoners, they were released and sent back to France onboard two transports, shadowed by an austrian cruiser to prevent any bad ideas of their captains.
One was sold sold to the Austrian Lloyd for use as fleet auxiliary when required.
Conclusions for Naval command:
Naval command was reminded of the power of night torpedo attacks, but also of the vulnerability of comparatively large cruisers. A larger torpedo boat, the Chimäre-class, was designed and construction started to have torpedo carriers.
While wanting to perform such attacks, the fleet does not want to be the victim of such a strike. Research has been tasked to find possibilites to detect attempted night attacks. Long-range topedoes are also a research objective.
[and yes, Aubrey island is the home of testudo aubreii

]
if its the wrong forum or not wanted, sorry. criticism welcome.