PT Imp Pack

	[Edit] PT Imp Pack III No.1639 PT小鬼群 Abyssal Destroyer
	Statistics
Air Power	Slots
0	2
Equipment	Space
	Extra Statistics Day Battle Shelling (20) Closing Torpedo 123 ASW Attack Day/Night (13+) Night Battle Cut-in: Torpedo (199 x2)

	[Edit] PT Imp Pack II No.1638 PT小鬼群 Abyssal Destroyer
	Statistics
Air Power	Slots
0	2
Equipment	Space
	Extra Statistics Day Battle Shelling (14) Closing Torpedo 123 ASW Attack Day/Night (13+) Night Battle Cut-in: Torpedo (190 x2)

	[Edit] PT Imp Pack No.1637 PT小鬼群 Abyssal Destroyer
	Statistics
Air Power	Slots
0	2
Equipment	Space
	Extra Statistics Day Battle Shelling (14) Closing Torpedo 103 ASW Attack Day/Night (13+) Night Battle Single Torpedo (107)

Info

Basic

Basic II

Basic III

Basic IV

[Edit] PT Imp Pack IV No.1640 PT小鬼群 Abyssal Destroyer

Statistics
HP		18	Firepower	18
Armor		39	Torpedo	118
Evasion		??	AA	24
Aircraft		0	ASW	??
Speed		Fast	LoS	??
Range		Short	Luck	??
Air Power					Slots
0					2
Equipment					Space
	High-speed Abyssal Torpedo				0
	High-speed Abyssal Torpedo				0
	- Locked -				-
	- Locked -				-
Extra Statistics Opening Airstrike No Opening Torpedo No Day Battle Shelling (23) Artillery Spotting No Closing Torpedo 143 ASW Attack Day/Night (13+) Night Battle Cut-in: Torpedo (234 x2)

Quotes

Event	Japanese	English
Introduction	None
Attacking	キャッハハ…キャハハッキャッ……キャハハ…	Kyahaha... Kyahaha kya... kyahaha...
Under attack	イ゛イ゛ッ…！　イ゛ィーッ……！	Iiig...! Iiiiig....!
Sunk	None

Character

Seiyuu: Komatsu Mikako? (小松未可子)

EnWiki Notes

On 11/20/2015, a tweet revealed a bug that prevented destroyers from being able to hit the PT Imp Groups. As a result the devs readjusted the damage calculations in a live patch update on the same day.

PT Imps were introduced during the Summer 2017 Event.

Anti-PT boat

Unlike most standard Abyssals, "PT boats" ( & ) are "very small and fast".

All ship types suffer a severe accuracy and firepower penalty against PT boats.
Attacking them with larger guns is not very effective, smaller guns being recommended instead.
Support Expeditions are not affect by any of the following^[1].

Attack formula against PT boats
The Attack formula against PT boats:^[2]^[3] Jet Assault & Airstrike [math]\displaystyle{ \text{Damage}_\text{PT}= \text{Atk}_\text{post-cap} \times \text{Rand} [0.5 ; 0.8] }[/math] LBAS^[4] [math]\displaystyle{ \text{Damage}_\text{PT}= \text{Atk}_\text{post-cap} \times \text{Rand} [0.4 ; 0.7] }[/math] Shelling [math]\displaystyle{ \text{Damage}_\text{PT}= ( 0.3 \times \text{Atk}_\text{post-cap} + \sqrt{\text{Atk}_\text{post-cap}} + 10 ) \times \prod^{All Equipment}{\text{Mod}_\text{EquipmentAtk}} }[/math] Opening & Closing Torpedo Salvos [math]\displaystyle{ \text{Damage}_\text{PT}= 0.3 \times \text{Atk}_\text{post-cap} + \sqrt{\text{Atk}_\text{post-cap}} + 10 }[/math] Night Battle Night Battle data are unclear yet. With [math]\displaystyle{ \text{Atk}_\text{post-cap} }[/math] the post cap attack power defined here, [math]\displaystyle{ \text{Mod}_\text{EquipmentAtk} }[/math] the bonuses given by equipment, described below.

Accuracy formula against PT boats

The Accuracy formula against PT boats:^[5]^[6]^[7]^[8]

[math]\displaystyle{ \text{Hit Rate}_\text{vs.PT} \text{%} = \Big\lfloor ( 0.3 \times \text{Accuracy}_\text{Atk} + \sqrt{\text{Accuracy}_\text{Atk}} + 15 ) \times 1.2 \times \text{Mod}_\text{Ship} \times \Big( \prod^{All Equipment}{\text{Mod}_\text{EquipmentAcc}} \Big) \times \text{Mod}_\text{Night} \Big\rfloor - \text{EVA}_\text{PT} + 1 }[/math]

With

[math]\displaystyle{ \text{Acc}_\text{Atk} }[/math] the standard accuracy described here
- PT boats are "DDs" in the game, so the [math]\displaystyle{ \text{Mod}_\text{formation} }[/math] for vanguard is 1.1 during shelling, and 1.2 during the torpedo phase.
- Historical accuracy bonuses during Events are included in the Standard Accuracy Term, i.e. it is affected by the [math]\displaystyle{ \text{Mod}_\text{PT} }[/math] modifier.
[math]\displaystyle{ \text{EVA}_\text{PT} }[/math] the PT estimated evasion described bellow,

PT boats stats
Type	Luck	Eva	[math]\displaystyle{ \text{EVA}_\text{PT} }[/math]
Type	Luck	Eva	Line Ahead	Echelon	Line Abreast
PT Imp Pack	?	?	81?	87?	?
PT Imp Pack II	60	220	80	87	85
PT Imp Pack III	60	250	82	89	88
PT Imp Pack IV	?	?	?	84?	?
Schnellboot Imp Pack	?	?	?	?	?
Schnellboot Imp Pack II	?	?	?	?	?
Schnellboot Imp Pack Elite	?	?	?	?	?

The main Accuracy modifiers are

[math]\displaystyle{ \text{Mod}_\text{Amagiri} }[/math] being include in [math]\displaystyle{ \text{Acc}_\text{Atk} }[/math]:
- 65 for Amagiri Kai Ni/D
- 35? for DD and DE adjacent to Amagiri Kai Ni/D.
- 0 otherwise.
[math]\displaystyle{ \text{Mod}_\text{Ship} }[/math] the bonus given by ship types, described below,
[math]\displaystyle{ \text{Mod}_\text{EquipmentAcc} }[/math] the bonuses given by equipment, described below,
[math]\displaystyle{ \text{Mod}_\text{Night} }[/math] being 0.7 during night battle, 1 during day battle.

Amagiri Kai Ni/D
has the ability to prioritize focusing on attacking PT imps with significantly increased accuracy if any are present.

DD placed in the composition slots above and below her will gain a noticeable accuracy boost and will prioritize attacking PT boats if any are present.
The PT boat targeting rate is 100% for all affected ships ^[9].

During Events, some special bonuses may be added, with "historical" ships and equipment gaining some accuracy bonuses^[10].

Ship Type	[math]\displaystyle{ \text{Mod}_\text{Ship} }[/math]
DD & DE	1.0
CL, CLT, & CT	0.82
All other types	0.7

Equipment		[math]\displaystyle{ \text{Mod}_\text{EquipmentAcc} }[/math]		[math]\displaystyle{ \text{Mod}_\text{EquipmentAtk} }[/math]
Equipment		1st equipped	2nd equipped	1st equipped	2nd equipped
Small	Small Caliber Main Guns^[11]	1.3	1.15	1.5	2.11.5×1.4
Sec	Secondary Guns^[12]	1.55	1	1.3
	Anti-Aircraft Guns	1.45	1.35	1.2	1.441.2×1.2
	Skilled Lookouts	1.75	1	1.1
Armed	Soukoutei (Armored Boat Class)	1.45	1.3	1.2	1.1
Armed	Armed Daihatsu	1.45	1.3	1.2	1.1
	Ka-Tsu Tanks ^[13]^[14]	1	1.3	1	1.1
Bomber	Seaplane Bombers & Seaplane Fighters	1.5	1	1.2
	Dive Bombers & Jets	1.375	1.2	1.4	1.821.4×1.3
All other equipment		1		1

Notes

It is recommended to use anti-PT setups on DDs only, such setups compromising overall combat effectiveness.
Having a Reinforcement Expansion is important because it can save a ship slot by containing a machine gun or skilled lookouts.
Combining equipment is recommended to see significant boosts to accuracy.
The Ka-Tsu Tanks
bonus does not stack with the Armed Boats
ones.
Using other setups improving accuracy is also advisable:
- Hidden accuracy bonus setups,
- Sparkled ships.

References:
↑ https://twitter.com/yukicacoon/status/1701605514671751674 ↑ https://twitter.com/yukicacoon/status/1621162082245967876 ↑ https://wikiwiki.jp/kancolle/PT%E5%B0%8F%E9%AC%BC%E7%BE%A4 ↑ https://twitter.com/Divinity_123/status/1659942254671216642 ↑ https://twitter.com/Xe_UCH/status/1554299068486397953?s=20&t=OHU47ATyROzVxkmLVVTL-w ↑ https://docs.google.com/spreadsheets/d/1-T9OfSDOoLKQXtBDeP80izgWl3f5G_eqMQYLW-WbSnw/edit#gid=680928319 ↑ https://twitter.com/Divinity_123/status/1492264067809038343 ↑ https://docs.google.com/spreadsheets/d/1BpctZEkEF94iOR1I704d3Rn9kKg1gAj9tK4cXdq1CNs/edit#gid=0 ↑ https://twitter.com/twillwave1024/status/1705662216979324937 ↑ https://twitter.com/Divinity_123/status/1492264067809038343?s=20&t=wbO5mDqGOL3gRBY9jG3c5w ↑ Medium Medium Main High-Angle Guns do not to work here. ↑ Sp_Sec Large Secondary (High-Angle) Guns may work here too, to be determined. ↑ https://twitter.com/yukicacoon/status/1770007636160946603 ↑ https://twitter.com/yukicacoon/status/1781690482130911711

[edit]

WikiaNotes

All ship classes suffer a severe accuracy and firepower penalty against PT Imp Packs.
Starting from the Summer 2017 Event, airstrike, aerial support, opening torpedo as well as previous anti-imp equipment are no longer effective. Instead, certain equipment combinations are now observed to have accuracy and firepower bonuses against PT Imp Packs.
At least two different types of equipment must be combined to see significant boosts to accuracy.
- Skilled lookouts give very high boost to accuracy, and reaching very high accuracy is hard without them
- Stacking multiple of other types (without skilled lookouts) can give somewhat high accuracy. For instance, two secondary guns and one machine gun
Applicable equipment types
- Skilled Lookouts
- Small main guns
- Secondary guns
- AA/machine guns
- Seaplane scouts/bombers
Typically destroyers are used as anti-PT imp because they usually want to have small main guns equipped regardless, however CL, CLT, AV, CA(V), BB(V) are also sometimes used as well depending on the circumstances
Equipping more different types of equipment will increase accuracy greatly, but some types (guns, machine guns) will increase accuracy further if two of the same type are equipped, albeit less than equipping an additional type instead.
Some equipment types give extra firepower bonuses against PT Imp Packs, namely the main/secondary guns. For very high probability of sinking in one hit, at least one gun-type equipment effective against PT Imp Packs is usually needed.
More equipment types, applicable ship types and/or synergy combos may have yet to be found/tested

The PT Imp Packs are assumed to have extremely high evasion, so anything that improves the shipgirls' hit rate will be very beneficial such as--but not limited to: sparkling morale, fit guns, surface radars, high accuracy formations (e.g. Double Line, Cruising Formation 4) and Akashi improved★ equipment.

Support shelling and LBAS bombing appear to be fairly effective against PT Imps.

References

Trivia

They are most likely a reference to the Patrol Torpedo boats deployed by United States Navy during the World War II.
- Nicknamed "Devil Boats" by the Japanese.
Currently the only non-boss abyssal ships with voice lines apart from Artillery Imp.

[1] ttps://twitter.com/yukicacoon/status/1701605514671751674

[2] ttps://twitter.com/yukicacoon/status/1621162082245967876

[3] ttps://wikiwiki.jp/kancolle/PT%E5%B0%8F%E9%AC%BC%E7%BE%A4

[4] ttps://twitter.com/Divinity_123/status/1659942254671216642

[5] ttps://twitter.com/Xe_UCH/status/1554299068486397953?s=20&t=OHU47ATyROzVxkmLVVTL-w

[6] ttps://docs.google.com/spreadsheets/d/1-T9OfSDOoLKQXtBDeP80izgWl3f5G_eqMQYLW-WbSnw/edit#gid=680928319

[7] ttps://twitter.com/Divinity_123/status/1492264067809038343

[8] ttps://docs.google.com/spreadsheets/d/1BpctZEkEF94iOR1I704d3Rn9kKg1gAj9tK4cXdq1CNs/edit#gid=0

[9] ttps://twitter.com/twillwave1024/status/1705662216979324937

[10] ttps://twitter.com/Divinity_123/status/1492264067809038343?s=20&t=wbO5mDqGOL3gRBY9jG3c5w

[11] Medium Medium Main High-Angle Guns
do not to work here.

[12] Sp_Sec Large Secondary (High-Angle) Guns may work here too, to be determined.

[13] ttps://twitter.com/yukicacoon/status/1770007636160946603

[14] ttps://twitter.com/yukicacoon/status/1781690482130911711

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[9]

[10]

[11]

[12]

[13]

[14]