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Submarine Radar & Passive Radiolocator (E27)
No.211 潜水艦搭載電探&逆探(E27)
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 Submarine EquipmentEffects:
 +1  +1  +3  +11  +5Scrap value:
 13  15 (Unbuildable) | |
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| Refittable Class | |
| Coastal Defense Ship | Destroyer |
| Light Cruiser | Torpedo Cruiser |
| Heavy Cruiser | Training Cruiser |
| Aviation Cruiser | Fast Battleship |
| Battleship | Aviation Battleship |
| Light Carrier | Standard Aircraft Carrier |
| Armored Carrier | Seaplane Tender |
| Submarine | Aircraft Carrying Submarine |
| Submarine Tender | Fleet Oiler |
| Repair Ship | Amphibious Assault Ship |
Introduction
潜水艦に搭載する、索敵及び水上偵察用装備です。
艦橋上部に集中装備する多数の優れた水防式望遠鏡と水上電探及び対空電探群、さらに有用性の高い電探(E27)によって、脅威や目標の早期発見に努めます。
Installed on a submarine for scouting and surface reconnaissance purposes.
Equipped to the upper part of the bridge, a number of excellent waterproof telescopes, surface and air radars concentrated with a more useful high radar (E27) will try to detect threats at an early stage.
Notes
Unbuildable
- It does not reduce maelstrom effects.
- April 2018 Ranking Reward for Top 20.
Characteristics of New Submarine Torpedo Mounts
Can be used together with Late Model Bow Torpedo Mount (6 tubes) or Skilled Sonar Personnel + Late Model Bow Torpedo Mount (6 tubes) to trigger Torpedo Cut-In types with improved damage modifiers over standard Torpedo Cut-Ins.
| Torpedo Cut-In modifiers | |||
|---|---|---|---|
| Torpedoes | Submarine radars | Modifier | |
| Old | New | ||
| 1 | 0 | 1 | N/A |
| 1 | 0 | 2 | |
| 2 | 0 | 0 | 1.5 |
| 2 | 0 | 1 | |
| 1 | 1 | 0 | |
| 0 | 2 | 0 | 1.6 (?) |
| 1 | 2 | 0 | |
| 0 | 1 | 1 | 1.75 |
| 1 | 1 | 1 | |
| 0 | 1 | 2 | |
| 0 | 2 | 1 | |
Trivia
The Navy E-27 Receiver (海軍「仮称電波探知機(逆探)」E-27受信機) was a Electronic Support Measure (ESM) Radar Warning Receiver (RWR) based on the Metox RWR brought back to Japan during the Submarine Dispatch Operations to Germany (遣独潜水艦作戦).
- Various Japanese submarines were equipped with German RWR's:
- On 6 August 1942, I-30 was fitted with Metox when she was moved to one of the U-boat pens in the Keroman Submarine Base, Lorient, France.
- On 20 August 1943, Metox was installed on I-8 by the tripulation of U-161.
- On 5 December 1943, I-29 was equipped with the Metox installed on I-8. Later on 14 February 1944, the tripulation of U-518 installs the newer Naxos and Wanze RWR's on her bridge.
- On 22 June 1943, I-52 was equipped with Naxos by the tripulation of U-530 before being sunk on the night of 24 June.
- On July 1943, Yamashiro was used to test a prototype version of the E-27 Receiver. The tests were met with success, thus 800 units were produced by Spring of the following year and 2,500 units by the end of the war.
- Prior to Yamashiro's tests, on 1 June 1943, Yukikaze was equipped with an RWR prior to the Battle of Kolombangara.
- The E-27 was equipped on the I-400-class and Ha-101-class submarines, among other vessels.
See also
- Radar warning receiver (Wikipedia)
- Radiolocation (Wikipedia)
- 電波探知機 (Japanese Wikipedia)
- 海軍電波探信儀関連機材 - Yokohama Radio Museum (Japanese link)
- 電波探知機（逆探） - 海軍レーダー徒然草 (Japanese link)
