Large and slow would be a battleship.
Medium and fast would be a frigate.
ANS 2 - The classic name would be a 'battleship', and they are not necessarily slow. - however it could also be a dreadnought, a cruiser, a frigate or a destroyer.
No not really they have two or three big guns
Corvette
A battleship, a battle cruiser or a cruiser, depending on its size.
Frigate
Building an AEGIS naval defense ship.
what naval ship did Britain and Germany want?
a Very lage cruise ship which was sunk by an iceberg in April, 1912
A destroyer.
German naval ship Mühlhausen was created in 1967.
German naval ship Mühlhausen ended in 2007.
A naval battery refers to a group of heavy guns or artillery pieces placed on a warship or near a coast to defend against naval attacks. These batteries provide firepower to protect the ship or the surrounding area from enemy vessels or threats. They are a key component of naval warfare strategies.
Derek R. Hayes has written: 'His Majesty's late ship the Invincible Third Rate 74 Guns, 1765-1801' -- subject(s): British Naval operations, Invincible (Ship, 1765-1801), Napoleonic Wars, 1800-1814, Naval operations, British