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PT Imp Pack

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Info

Basic

PT Imp Pack

No.1637 PT小鬼群

Abyssal Destroyer

 
Statistics
  HP 9   Firepower 9
  Armor 19   Torpedo 88
  Evasion ??   AA 12
  Aircraft 0   ASW ??
  Speed Fast   LoS ??
  Range Short   Luck ??
Air Power Slots
0 2
Equipment Space
  High-speed Abyssal Torpedo260px 0
  - Unequipped - 0
- Locked - -
- Locked - -
Extra Statistics
  Opening Airstrike
No
  Opening Torpedo
No
  Day Battle
Shelling (14)
   Artillery Spotting
No
  Closing Torpedo
103
  ASW Attack
Day/Night (13+)
   Night Battle
Single Torpedo (107)

Basic II

PT Imp Pack II

No.1638 PT小鬼群

Abyssal Destroyer

 
Statistics
  HP 9   Firepower 9
  Armor 29   Torpedo 98
  Evasion ??   AA 18
  Aircraft 0   ASW ??
  Speed Fast   LoS ??
  Range Short   Luck ??
Air Power Slots
0 2
Equipment Space
  High-speed Abyssal Torpedo260px 0
  High-speed Abyssal Torpedo260px 0
- Locked - -
- Locked - -
Extra Statistics
  Opening Airstrike
No
  Opening Torpedo
No
  Day Battle
Shelling (14)
   Artillery Spotting
No
  Closing Torpedo
123
  ASW Attack
Day/Night (13+)
   Night Battle
Cut-in: Torpedo (190 x2)

Basic III

PT Imp Pack III

No.1639 PT小鬼群

Abyssal Destroyer

 
Statistics
  HP 15   Firepower 15
  Armor 29   Torpedo 98
  Evasion ??   AA 18
  Aircraft 0   ASW ??
  Speed Fast   LoS ??
  Range Short   Luck ??
Air Power Slots
0 2
Equipment Space
  High-speed Abyssal Torpedo260px 0
  High-speed Abyssal Torpedo260px 0
- Locked - -
- Locked - -
Extra Statistics
  Opening Airstrike
No
  Opening Torpedo
No
  Day Battle
Shelling (20)
   Artillery Spotting
No
  Closing Torpedo
123
  ASW Attack
Day/Night (13+)
   Night Battle
Cut-in: Torpedo (199 x2)

Basic IV

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 Torpedo260px 0
  High-speed Abyssal Torpedo260px 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 Note
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

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" (PT Imp Pack  & Schnellboot Imp Pack ) 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]
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]:
  • [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]
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 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:
References:
  1. ↑ https://twitter.com/yukicacoon/status/1701605514671751674
  2. ↑ https://twitter.com/yukicacoon/status/1621162082245967876
  3. ↑ https://wikiwiki.jp/kancolle/PT%E5%B0%8F%E9%AC%BC%E7%BE%A4
  4. ↑ https://twitter.com/Divinity_123/status/1659942254671216642
  5. ↑ https://twitter.com/Xe_UCH/status/1554299068486397953?s=20&t=OHU47ATyROzVxkmLVVTL-w
  6. ↑ https://docs.google.com/spreadsheets/d/1-T9OfSDOoLKQXtBDeP80izgWl3f5G_eqMQYLW-WbSnw/edit#gid=680928319
  7. ↑ https://twitter.com/Divinity_123/status/1492264067809038343
  8. ↑ https://docs.google.com/spreadsheets/d/1BpctZEkEF94iOR1I704d3Rn9kKg1gAj9tK4cXdq1CNs/edit#gid=0
  9. ↑ https://twitter.com/twillwave1024/status/1705662216979324937
  10. ↑ https://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. ↑ https://twitter.com/yukicacoon/status/1770007636160946603
  14. ↑ 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 a reference to the Patrol Torpedo boats deployed by United States Navy during World War II.
    • Nicknamed "Devil Boats" by the Japanese.
  • Currently the only non-boss abyssal ships with voice lines apart from Artillery Imp.
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