There were two issues at work here:
1) The combination of default MaximumLaunchAngle and default CruiseAltitude made torpedoes fly a ballistic curve, which combined with BoundToTerrain type made them explode 'in the air' when hitting non-water tiles. This would result in AIr returned as target type, which is invalid for torpedoes.
2) The explosion warheads were missing the Ground target type, which is actually the (only) target type that the bridge tiles you hit with torpedoes have.
On bleed, both the explosion as well as the water splash warhead of weapons triggered on bridges, since they have both the Ground and Water target types.
Ground cannot be made invalid for water splashes without causing regressions elsewhere, so a new Bridge target type is introduced to explicitly make bridges invalid targets for water splash effect warheads.
The combination of HitShape, but not Targetable makes the actors be considered invalid for effect warheads.
Lack of Targetable makes them invulnerable anyway, so removing HitShape and Health (and Explodes) is the most logical fix.
Before this, it was impossible to replicate the behavior of the original games (staying on pad/airfield after reload) without hacking around in Mods.Common.
This allows modders to disable these without meddling with code.
Since the original sound contains 3 shots, it could happen that the sound played even though only 1 shot had been fired.
Additionally, it could happen that no sound was played when shooting because the first burst had already been fired.
Finally, in the original the 3rd shot was delayed a little compared to the first two.
This adresses all these issues.
