Torpedoes are the main armament. older Diesel submarines had deck guns for surface defense and anti-aircraft, but the modern ones do not have fixed deck armament. Of course FBM submarines carry Guided Missiles.
More:
Most WW2 Submarines carried several torpedoes, and had 4-6 forward firing tubes and 1-2 rear firing tubes. Older subs were not intended to run submerged full time the way modern subs do. There was no snorkel mast (technology taken from captured German subs at end of WW2) on most subs and they had to run on the surface to recharge their batteries for submerged operations. They also were faster on the surface than submerged. So they had surface weapons in addition to torpedo tubes. Usually a main gun, about 5 inches or so; and an anti-air gun similar to a .50 cal. The measurements would vary depending on the country as the US uses standard measurement and most other countries use metric.
They had no weapons.
Kate Torpedo Airplanes, Val Dive Bombers, Zero Fighter Planes, Mini-Submarines launched from Mother Submarines.
Germany must surrender its submarines and weapons.
Submarines and Aircraft Carriers
Battleships (called Dreadnaughts based upon the design of HMS Dreadnaught), Battlecruisers, cruisers, destroyers, submarines, and one aircraft carrier.
Germany must surrender its submarines and weapons
submarines were used in WW1 and the weapons used were torpedos and a deck gun.
Weapons launched (fired) from submarines include torpedoes, ballistic missiles, or cruise missiles. These are the primary weapons, and a few other options exist.
They had no weapons.
machine guns, submarines and poisen gas
Since its free-fall nuclear weapons arsenal was decomissioned in 1998, the United Kingdom's only means of nuclear weapons delivery is via submarines and SLBMs.
The existence of submarines forced other countries to develop anti-submarine weapons and detection systems.
Kate Torpedo Airplanes, Val Dive Bombers, Zero Fighter Planes, Mini-Submarines launched from Mother Submarines.
The major weapons were machine guns, artillery guns, poison gas, tanks, zepplins and submarines.
machine guns tanks poison gas submarines airplanes
Reactors power submarines and many surface ships. Nuclear weapons.
Most fast-attack submarines rely on several anti-ship / anti-submarine weapons, but the most common U.S. weapons are: Mk. 48 ADCAP Torpedo (surface ship and submarine) Tomahawk Anti-Ship Missile (TASM) (surface ship) Harpoon Anti-Ship Missile (surface ship) Mk. 60 CAPTOR Mines (submarines) U.S. submarines also carry the land-attack version (conventional, multi-purpose or nuclear) versions of the Tomahawk (TLAM, TLAM-N).