1. Guidance sonar
   Periscope
2. Turret
   Aft sonar

The periscope is probably the most recognizable submarine equipment ever. You use it to look at what’s happening outside.

1. Tachometer
   Cam trough
2. Torpedo
   Attack periscope

The torpedo is usually carried by a submarine. This is the usual weapon associated with this vessel.

1. Diving planes
   Trim tank
2. Line shaft
   Economical Motor

These are called diving planes. They’re useful to navigate the sub when it goes underwater.

1. Snorkel
   Sump
2. Drain
   Sail

This part is called the sail. It houses other equipment as well.

1. Rudder
   Depth control
2. Capstan
   Deck skid

This is called a rudder. It’s very useful equipment for navigating the sub.

1. Forward bearing
   Propeller
2. Economical Motor
   Thrust shaft

The propeller has the same universal function anywhere on any vehicle. It’s supposed to push it forward when it moves.

1. Trim tank
   Water plant
2. Main ballast tank
   Pelorus

This is the submarine’s main ballast tank. There could be more than one in a sub.

1. Turbines
   Guidance sonar
2. Auxiliary Motor
   Stern plane

The stern plane is useful equipment for actually controlling where the sub will go. It’s in charge of the course, in a way.

1. Torpedo tank
   Attack periscope
2. Deck gun
   Weapons stowage

A deck gun looks like a huge machine gun. It has great firepower.

1. Sonar gear
   Mallet
2. Compass loop
   Hatch

Sonar gear is very useful in a submarine. Sonar is actually an acronym which means Sound and Navigation Ranging.

1. Depth control
   Lower rudder
2. Hatch operating wheel
   Forward fin

Submarines also have fins. The ones in the front are called forward fins.

1. Steering wheel
   Aft fin
2. Reduction gear
   Surface navigation mast

The aft is technically the back part of the submarine. So, the fins there are called aft fins.

1. Battery bank
   Economical Motor
2. Auxiliary Motor
   Condenser

Submarines are powered by many batteries. They’re in the battery bank somewhere inside.

1. Pneumatic air coupling
   Air conditioning plant
2. Air purification plant
   Hydraulic plant

The air conditioning plant is a necessary equipment system in a sub. Imagine if it’s hot in there!

1. Radar mast
   Thrust shaft
2. Dutch breech
   Reduction gear

This is called the radar mast. It co-exists with other mast equipment in its current spatial design.

1. Engine room
   Operating wheel
2. Companionist
   Main access hatch door

The entrance to the submarine is covered by the main access hatch door. It’s that one you see on top.

1. Tachometer
   Pelorus
2. Radio antenna
   Chock

A sub is also equipped with a radio antenna. It’s a necessary communications device.

1. Air compressor
   Torpedo tube
2. Machine Gun
   Casing

The torpedo normally has a storage place. So, of course, it will also get ejected through its own torpedo tube.

1. Bulkhead
   Bedplate
2. Refectory
   Cabin

A bulkhead pertains to a partition in the hull. In the submarine’s case, it’s that wall and complicated door contraption you see there, designed to be very watertight.

1. Vertical plate
   Communications mast
2. Air inlet
   Attack periscope

This is the communications mast. It’s built side by side with the other masts atop the sail.

1. Economical Motor
   Auxiliary Motor
2. Electric propulsion motor
   Reduction gear box

This is the main electric propulsion motor. It’s important equipment to make the submarine move.

1. Photonics mast
   Periscope
2. Guidance sonar
   Attack periscope

The photonics mast is the more high-tech equivalent of the periscope. Military grade submarines have this instead.

1. Intercom
   Engine Order Telegraph
2. Switchboards
   Hydrophones

A hydrophone is indeed the cousin of a microphone. Only this is the kind used under water.

1. Headphones
   Control room
2. Conning tower
   AMS

People inside a sub need headphones to listen closely to what they’re monitoring. So there are a lot of these there.

1. Compensating tank
   Rotor
2. Boombox
   Receiver-amplifiers

A lot of listening takes place inside a submarine. Naturally, it is equipped with receiver-amplifiers.

1. Derrick boom
   Supersonic gears
2. Anchor
   Telegraph

Supersonic gears are set up to listen to any kind of sound that’s not easily audible to the human ear. There are all types of sounds underwater!

1. Pneumatic air coupling
   Surface navigation mast
2. Snort induction mast
   Radar mast

Subs have a snort induction mast on the sail. It’s not as nasty as it sounds, y’all!

1. Air compressor
   Snort exhaust mast
2. Air inlet
   Air purification plant

Subs also need a snort exhaust mast to let out smoke. It’s next to the snort induction mast.

1. Forward bearing
   Auxiliary Rotor Blade
2. Aft bearing
   Propeller shaft

A propeller always needs to be attached to a propeller shaft. Or else, it will not work!

1. Loudspeaker
   Receiver
2. Hydrophones
   Tachometer

Inside the sub, there are also loudspeakers for people to hear things. A sub could really be huge, so this is no surprise.

1. Trim tank
   Torpedo tank
2. Compensating tank
   Reduction gear box

A submarine has different kinds of tanks, and the compensating tank is one of them. These tanks are used to balance the buoyancy of the sub, thereby affecting how it weighs during certain moments, like when it goes underneath the waters at a greater depth.

1. Seawater inlets
   Escape hatch
2. Bolt Guard plates
   Thermometer

The escape hatch is different from the main access hatch. It’s good to differentiate them when you’re inside.

1. Oil tank
   Trim tank
2. Torpedo tank
   Negative tank

Negative tanks offer additional help to a submarine’s system when it comes to buoyancy. They are also called quick diving tanks.

1. Diving planes
   Anchor
2. Rudder
   Propeller

Yup, a submarine also has an anchor. It has to dock sometime somewhere!

1. Intercom
   Ship sails
2. Pick axe
   Switchboards

A submarine has to have intercom equipment. They’re needed so that people inside can talk to each other when working in different parts of the sub.

1. Engine Order Telegraph
   Magazine
2. Compass loop
   Capstan

An Engine Order Telegraph has words that help to navigate the submarine. It’s actually a communication device.

1. Missile
   Nuclear reactor
2. Mainframe tank
   Igneous detector

Would you believe that there’s a nuclear reactor inside a submarine? That’s because some subs are designed to be powered by nuclear energy.

1. Biplane
   High-voltage regulator
2. Missile
   Nuclear reactor

A submarine can also carry missiles. And yes, they get fired underwater, too.

1. Buoyancy floater
   Motherboard
2. Propulsion room
   Navigational control system

All those buttons and dials! They’re part of the navigational control system, which is very important equipment inside a submarine.