Ship Database
Tier X Submarine

Italy

Pietro Calvi

Pietro Calvi was the lead ship of a class of comparatively large cruiser submarines that entered service in 1935 and 1936. She participated in the naval blockade during the Spanish Civil War. During World War II, she operated in the Atlantic from a base in German-occupied Bordeaux, France. Pietro Calvi conducted seven patrols and sank six cargo ships in...

Read full ship history

Pietro Calvi was the lead ship of a class of comparatively large cruiser submarines that entered service in 1935 and 1936. She participated in the naval blockade during the Spanish Civil War. During World War II, she operated in the Atlantic from a base in German-occupied Bordeaux, France. Pietro Calvi conducted seven patrols and sank six cargo ships in total. In July 1942, while out on her eighth patrol, she was sunk by a British escort.

Credits
28,000,000
Official profile image of Pietro Calvi

At a glance

The numbers that shape the ship

Hit points
18,800
Maximum speed
29.0 knots
Surface detection
5.9 km
Main battery range
10.5 km
Main battery reload
5.0 s

Combat envelope

Range and detection

Scale: 15 km

Every bar uses the same 15 km scale. Surface detection is a visibility threshold, not a weapon range.

  • Surface detection5.9 km
  • Main battery10.5 km
  • Torpedoes9 km
  • Sonar ping10 km

Damage comparison

Published maximum per hit

Ship-relative

Bars are normalized only against this ship's highest listed hit. They are not salvo damage, expected damage or DPM.

  • Torpedo · 533 mm 12,033
Handling, concealment and protectionOverview

Handling

Maximum speed
29.0 knots
Turning circle radius
460 m
Rudder shift time
6.7 s
Maneuverability API rating 51

Concealment

Surface detection
5.9 km
Air detection
2.1 km
Submarine detection
2.1 km
Concealment API rating 96

Survivability

Hit points
18,800
Torpedo damage reduction
0 %
Survivability API rating 34

Published armour thickness

Only positive values supplied by the API are shown.

Overall published range
6–19 mm
Weapons and payloadsArmament

Surface armament

Main battery

Artillery API rating 30
Maximum range
10.5 km
Reload time
5.0 s
Rate of fire
10.9 rounds/min
180° turn time
7.2 s
Maximum dispersion
51 m
Gun layout
Mount
120 mm/45 Model 1931 on a single mount
Mounts
2
Barrels each
1

Automatic armament

Secondary battery

Underwater armament

Torpedoes

Torpedoes API rating 30

533 mm

Maximum range
9.0 km
Maximum damage per hit
12,033
Reload time
77 s
Speed
60 knots
Detectability
1.4 km
Torpedo-tube layout
Mount
Torpedo Tubes: Bow Group
Mounts
4
Tubes each
1
Mount
Torpedo Tubes: Stern Group
Mounts
4
Tubes each
1
Submarine systemsClass system

Dive capacity

Maximum capacity
160.0
Consumption rate (API value)
1.0
Regeneration rate (API value)
1.5
Dive capacity API rating 17

Underwater handling

Maximum underwater speed
16 knots
Maximum dive/ascent speed
4.0 knots
Dive-plane shift time
18.2 s
Underwater maneuverability API rating 34

Sonar ping

Maximum range
10.0 km
Ping width (API value)
18
Ping velocity (API value)
550
Reload time (API value)
20.0
Single-sector duration (API value)
35
Double-sector duration (API value)
75
Sonar API rating 42
Modules, hull and progressionTechnical data

Default hull

Hull hit points
18,800
Main-battery barrels
2
Torpedo tubes
8

Engine

Published maximum speed
29.0 knots

Module research tree

Names, research prices and defaults are reported directly by the API.

Propulsion: 4,400 hp

Default
Type
Engine
Purchase
2,000,000 credits

533 mm Si 270

Default
Type
Torpedoes
Purchase
2,000,000 credits
Next modules
1

533 mm Si 270 M

Type
Torpedoes
Research
38,000 XP
Purchase
2,500,000 credits

Mk10 mod. 1

Default
Type
Sonar
Purchase
2,000,000 credits
Next modules
1

Mk10 mod. 2

Type
Sonar
Research
38,000 XP
Purchase
2,500,000 credits

120 mm/45 Model 1931 on a single mount

Default
Type
Artillery
Purchase
2,000,000 credits

Pietro Calvi

Default
Type
Hull
Purchase
3,000,000 credits

Compatible upgrades

Official modernization descriptions and listed purchase prices. Effects still depend on the slot and configuration used in game.

Propulsion Modification 1

Modernization

Reduces time to full speed

Credits
1,000,000

Torpedo Tubes Modification 1

Modernization

Credits
500,000

Damage Control System Modification 3

Modernization

Credits
250,000

Main Armaments Modification 1

Modernization

Credits
125,000

Torpedo Tubes Modification 2

Modernization

Credits
3,000,000

Aiming Systems Modification 1

Modernization

Credits
500,000

Damage Control System Modification 2

Modernization

Credits
1,000,000

Main Battery Modification 3

Modernization

Credits
3,000,000

Main Battery Modification 2

Modernization

Credits
500,000

Torpedo Tubes Modification 3

Modernization

Credits
2,000,000

Gun Fire Control System Modification 2

Modernization

Credits
3,000,000
Available module groups
10
Compatible upgrades
11
Upgrade slots
6
Published battle levels
10–11

Cross-nation comparison

Ships that fill a similar slot

Closest same-tier, same-class matches from other nations, ranked by published base statistics.

U.S.A.

Balao

HP
20,200
Speed
30 kn
Torps
12 km
Open comparison

Germany

U-2501

HP
18,900
Speed
27 kn
Torps
14 km
Open comparison

The Netherlands

Tonijn

HP
17,800
Speed
25 kn
Torps
12 km
Open comparison