Introduction
Because a lots is don't know what is Hedgehog lets see the characteristic :

That object can fly 20.km?

#1.For a single bomb

* Calibre: 7 in (178 mm)
* Weight: 65 lb (29 kg)
* Shell Diameter : 7.2 inches
* Shell Length: 3 feet 10.5 inches
* Explosive charge: 30 lb TNT or 35 lb (16 kg) Torpex
* Range: about 250 yards (200 to 259 m)
* Sinking speed: 22 to 23.5 ft/s (6.7 to 7.2 m/s)
* Fuse: Contact, High Explosive
* Firing Order: Ripple in pairs, one every tenth of a second
* Reload Time: ~3 minutes

[edit] Variants

* Mark 10: elliptical pattern measuring about 140 x 120 feet to a range of 200 yards
* Mark 11: circular pattern measuring 200 feet in diameter out to a range of about 188
yards.

The actual range of HH is like a CL(light cruiser)guns 15 to 20km amazing no?
So what gas propulsion or guns powder can BOOST the RANGE of 259m* to 20.000m?
Keeping snobbery the idiocracy of false presumption to keep balance in favor of big ships
maybe?No thx.


Is a simple HH not mini rocket see photo.

#2. An unsuccessful attack does not hide the submarine from sonar.

When a depth charge explodes it can take 15 minutes before the DISTURBANCE* can settle
down enough that sonar becomes effective. Many submarines escaped during the time after an
unsuccessful depth charge attack. Since Hedgehog charges only explode on contact, if they
miss, the submarine can still be tracked by sonar.

The Hedgehog's CONTACT* charge, on the other hand, had the cushion on the other side,
actually increasing the explosive shock. However near-misses with the Hedgehog did not
cause cumulative damage as depth charges did; nor did it have the same psychological
effect as a depth charge attack.

Proximity weapons (such as depth charges) need to be set for the target's correct depth to
be effective. Contact fused charges don't have that limitation. In addition, any explosion
indicates a 'hit'*

Conclusion:

I. Range maxim of HH :
250yards 260m , with NF buff 500m(two length of BB).

II. Disturbance Sonar if is hit, DC blind sonar 15min with NF buff 1min*.

III. No hit no explosion,pls report just one surface ships receive HH hit.

We can accept buff of SDE but no lies grossly tricked monkeys or kindergarten children,
we know the truth so :put dam the poll vote for HH.

Explain yours non like points or recom.

redite:
*PHH = +25% range after Poll vote,not reloading or other.**hamann
*blind sonar 2min to 1min